make unit tests happy

# Conflicts:
#	CoreStore.podspec
#	Sources/CoreStoreImportableAttributeType.swift
#	Sources/CoreStoreQueryableAttributeType.swift
#	Sources/Info.plist
#	Sources/NSManagedObjectModel+Setup.swift

.about.md

@@ -1,15 +0,0 @@
----
-layout: page
-title: About
-permalink: /about/
----
-
-This is the base Jekyll theme. You can find out more info about customizing your Jekyll theme, as well as basic Jekyll usage documentation at [jekyllrb.com](http://jekyllrb.com/)
-
-You can find the source code for the Jekyll new theme at:
-{% include icon-github.html username="jglovier" %} /
-[jekyll-new](https://github.com/jglovier/jekyll-new)
-
-You can find the source code for Jekyll at
-{% include icon-github.html username="jekyll" %} /
-[jekyll](https://github.com/jekyll/jekyll)

.gitignore

@@ -1,3 +1,9 @@
-_site
-.sass-cache
-.jekyll-metadata
+CoreStoreDemo/CoreStoreDemo.xcodeproj/project.xcworkspace/xcuserdata
+CoreStore.xcodeproj/project.xcworkspace/xcuserdata
+CoreStore.xcodeproj/xcuserdata
+CoreStoreDemo/CoreStoreDemo.xcodeproj/xcuserdata
+Carthage/Build
+CoreStore.xcworkspace/xcuserdata
+.DS_Store
+DerivedData
+*.orig

.swift-version

@@ -0,0 +1 @@
+3.1

.travis.yml

@@ -0,0 +1,45 @@
+language: objective-c
+osx_image: xcode8.3
+sudo: false
+git:
+  submodules: false
+notifications:
+  email: false
+env:
+  global:
+  - LC_CTYPE=en_US.UTF-8
+  - LANG=en_US.UTF-8
+matrix:
+    - DESTINATION="OS=10.3,name=iPhone 7"          SCHEME="CoreStore iOS"     SDK=iphonesimulator10.3  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=10.1,name=iPhone 7"          SCHEME="CoreStore iOS"     SDK=iphonesimulator10.3  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=9.0,name=iPhone 6 Plus"      SCHEME="CoreStore iOS"     SDK=iphonesimulator10.3  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=8.4,name=iPhone 6"           SCHEME="CoreStore iOS"     SDK=iphonesimulator10.3  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=8.3,name=iPhone 5S"          SCHEME="CoreStore iOS"     SDK=iphonesimulator10.3  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=8.3,name=iPhone 5"           SCHEME="CoreStore iOS"     SDK=iphonesimulator10.3  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=8.3,name=iPhone 4S"          SCHEME="CoreStore iOS"     SDK=iphonesimulator10.3  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="arch=x86_64"                    SCHEME="CoreStore OSX"     SDK=macosx10.12          RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=3.2,name=Apple Watch - 42mm" SCHEME="CoreStore watchOS" SDK=watchsimulator3.2    RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=2.2,name=Apple Watch - 42mm" SCHEME="CoreStore watchOS" SDK=watchsimulator3.2    RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=10.2,name=Apple TV 1080p"    SCHEME="CoreStore tvOS"    SDK=appletvsimulator10.2 RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=9.2,name=Apple TV 1080p"     SCHEME="CoreStore tvOS"    SDK=appletvsimulator10.2 RUN_TESTS="YES" POD_LINT="NO"
+before_install:
+  - gem install cocoapods --no-rdoc --no-ri --no-document --quiet
+  - gem install xcpretty --no-rdoc --no-ri --no-document --quiet
+  - curl -OlL "https://github.com/Carthage/Carthage/releases/download/0.20.1/Carthage.pkg"
+  - sudo installer -pkg "Carthage.pkg" -target /
+  - rm "Carthage.pkg"
+before_script:
+  - carthage update --use-submodules
+script:
+  - set -o pipefail
+  - xcodebuild -version
+  - xcodebuild -showsdks
+  - if [ $RUN_TESTS == "YES" ]; then 
+      xcodebuild -workspace CoreStore.xcworkspace -scheme "$SCHEME" -sdk "$SDK" -destination "$DESTINATION" -configuration Debug ONLY_ACTIVE_ARCH=NO clean test | xcpretty -c;
+      xcodebuild -workspace CoreStore.xcworkspace -scheme "$SCHEME" -sdk "$SDK" -destination "$DESTINATION" -configuration Release ONLY_ACTIVE_ARCH=NO clean test | xcpretty -c;
+    fi
+  - xcodebuild -workspace "CoreStore.xcworkspace" -scheme "CoreStore iOS" -sdk "iphonesimulator10.3" -destination "OS=10.3,name=iPhone 7" -configuration Debug ONLY_ACTIVE_ARCH=NO clean test | xcpretty -c;
+  - xcodebuild -workspace "CoreStore.xcworkspace" -scheme "CoreStore iOS" -sdk "iphonesimulator10.3" -destination "OS=10.3,name=iPhone 7" -configuration Release ONLY_ACTIVE_ARCH=NO clean test | xcpretty -c;
+  - if [ $POD_LINT == "YES" ]; then
+      pod lib lint --quick;
+    fi

CoreStore.podspec

@@ -0,0 +1,20 @@
+Pod::Spec.new do |s|
+    s.name = "CoreStore"
+    s.version = "4.0.0"
+    s.license = "MIT"
+    s.summary = "Unleashing the real power of Core Data with the elegance and safety of Swift"
+    s.homepage = "https://github.com/JohnEstropia/CoreStore"
+    s.author = { "John Rommel Estropia" => "rommel.estropia@gmail.com" }
+    s.source = { :git => "https://github.com/JohnEstropia/CoreStore.git", :tag => s.version.to_s }
+
+    s.ios.deployment_target = "8.0"
+    s.osx.deployment_target = "10.10"
+    s.watchos.deployment_target = "2.0"
+    s.tvos.deployment_target = "9.0"
+
+    s.source_files = "Sources", "Sources/**/*.{swift,h,m}"
+    s.public_header_files = "Sources/**/*.h"
+    s.frameworks = "Foundation", "CoreData"
+    s.requires_arc = true
+    s.pod_target_xcconfig = { 'OTHER_SWIFT_FLAGS[config=Debug]' => '-D DEBUG' }
+end

CoreStore.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:CoreStore.xcodeproj">
+   </FileRef>
+</Workspace>

CoreStore.xcodeproj/project.xcworkspace/xcshareddata/CoreStore.xccheckout

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDESourceControlProjectFavoriteDictionaryKey</key>
+	<false/>
+	<key>IDESourceControlProjectIdentifier</key>
+	<string>F347F55F-7F5C-4476-9148-6E902F06E4AD</string>
+	<key>IDESourceControlProjectName</key>
+	<string>CoreStore</string>
+	<key>IDESourceControlProjectOriginsDictionary</key>
+	<dict>
+		<key>4B60F1BCB491FF717C56441AE7783C74F417BE48</key>
+		<string>github.com:JohnEstropia/CoreStore.git</string>
+		<key>8B2E522D57154DFA93A06982C36315ECBEA4FA97</key>
+		<string>github.com:JohnEstropia/GCDKit.git</string>
+	</dict>
+	<key>IDESourceControlProjectPath</key>
+	<string>CoreStore.xcodeproj</string>
+	<key>IDESourceControlProjectRelativeInstallPathDictionary</key>
+	<dict>
+		<key>4B60F1BCB491FF717C56441AE7783C74F417BE48</key>
+		<string>../..</string>
+		<key>8B2E522D57154DFA93A06982C36315ECBEA4FA97</key>
+		<string>../..Libraries/GCDKit</string>
+	</dict>
+	<key>IDESourceControlProjectURL</key>
+	<string>github.com:JohnEstropia/CoreStore.git</string>
+	<key>IDESourceControlProjectVersion</key>
+	<integer>111</integer>
+	<key>IDESourceControlProjectWCCIdentifier</key>
+	<string>4B60F1BCB491FF717C56441AE7783C74F417BE48</string>
+	<key>IDESourceControlProjectWCConfigurations</key>
+	<array>
+		<dict>
+			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
+			<string>public.vcs.git</string>
+			<key>IDESourceControlWCCIdentifierKey</key>
+			<string>4B60F1BCB491FF717C56441AE7783C74F417BE48</string>
+			<key>IDESourceControlWCCName</key>
+			<string>CoreStore</string>
+		</dict>
+		<dict>
+			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
+			<string>public.vcs.git</string>
+			<key>IDESourceControlWCCIdentifierKey</key>
+			<string>8B2E522D57154DFA93A06982C36315ECBEA4FA97</string>
+			<key>IDESourceControlWCCName</key>
+			<string>GCDKit</string>
+		</dict>
+	</array>
+</dict>
+</plist>

CoreStore.xcodeproj/project.xcworkspace/xcshareddata/CoreStore.xcscmblueprint

@@ -0,0 +1,30 @@
+{
+  "DVTSourceControlWorkspaceBlueprintPrimaryRemoteRepositoryKey" : "4B60F1BCB491FF717C56441AE7783C74F417BE48",
+  "DVTSourceControlWorkspaceBlueprintWorkingCopyRepositoryLocationsKey" : {
+
+  },
+  "DVTSourceControlWorkspaceBlueprintWorkingCopyStatesKey" : {
+    "8B2E522D57154DFA93A06982C36315ECBEA4FA97" : 0,
+    "4B60F1BCB491FF717C56441AE7783C74F417BE48" : 0
+  },
+  "DVTSourceControlWorkspaceBlueprintIdentifierKey" : "F347F55F-7F5C-4476-9148-6E902F06E4AD",
+  "DVTSourceControlWorkspaceBlueprintWorkingCopyPathsKey" : {
+    "8B2E522D57154DFA93A06982C36315ECBEA4FA97" : "CoreStoreLibraries\/GCDKit",
+    "4B60F1BCB491FF717C56441AE7783C74F417BE48" : "CoreStore\/"
+  },
+  "DVTSourceControlWorkspaceBlueprintNameKey" : "CoreStore",
+  "DVTSourceControlWorkspaceBlueprintVersion" : 204,
+  "DVTSourceControlWorkspaceBlueprintRelativePathToProjectKey" : "CoreStore.xcodeproj",
+  "DVTSourceControlWorkspaceBlueprintRemoteRepositoriesKey" : [
+    {
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryURLKey" : "github.com:JohnEstropia\/CoreStore.git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositorySystemKey" : "com.apple.dt.Xcode.sourcecontrol.Git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryIdentifierKey" : "4B60F1BCB491FF717C56441AE7783C74F417BE48"
+    },
+    {
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryURLKey" : "github.com:JohnEstropia\/GCDKit.git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositorySystemKey" : "com.apple.dt.Xcode.sourcecontrol.Git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryIdentifierKey" : "8B2E522D57154DFA93A06982C36315ECBEA4FA97"
+    }
+  ]
+}

CoreStore.xcodeproj/project.xcworkspace/xcshareddata/HardcoreData.xccheckout

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDESourceControlProjectFavoriteDictionaryKey</key>
+	<false/>
+	<key>IDESourceControlProjectIdentifier</key>
+	<string>FE56D6CC-DFA6-4581-B49D-F2486374A545</string>
+	<key>IDESourceControlProjectName</key>
+	<string>project</string>
+	<key>IDESourceControlProjectOriginsDictionary</key>
+	<dict>
+		<key>4B60F1BCB491FF717C56441AE7783C74F417BE48</key>
+		<string>github.com:JohnEstropia/HardcoreData.git</string>
+		<key>8B2E522D57154DFA93A06982C36315ECBEA4FA97</key>
+		<string>github.com:JohnEstropia/GCDKit.git</string>
+	</dict>
+	<key>IDESourceControlProjectPath</key>
+	<string>HardcoreData.xcodeproj/project.xcworkspace</string>
+	<key>IDESourceControlProjectRelativeInstallPathDictionary</key>
+	<dict>
+		<key>4B60F1BCB491FF717C56441AE7783C74F417BE48</key>
+		<string>../..</string>
+		<key>8B2E522D57154DFA93A06982C36315ECBEA4FA97</key>
+		<string>../..Libraries/GCDKit</string>
+	</dict>
+	<key>IDESourceControlProjectURL</key>
+	<string>github.com:JohnEstropia/HardcoreData.git</string>
+	<key>IDESourceControlProjectVersion</key>
+	<integer>111</integer>
+	<key>IDESourceControlProjectWCCIdentifier</key>
+	<string>4B60F1BCB491FF717C56441AE7783C74F417BE48</string>
+	<key>IDESourceControlProjectWCConfigurations</key>
+	<array>
+		<dict>
+			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
+			<string>public.vcs.git</string>
+			<key>IDESourceControlWCCIdentifierKey</key>
+			<string>8B2E522D57154DFA93A06982C36315ECBEA4FA97</string>
+			<key>IDESourceControlWCCName</key>
+			<string>GCDKit</string>
+		</dict>
+		<dict>
+			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
+			<string>public.vcs.git</string>
+			<key>IDESourceControlWCCIdentifierKey</key>
+			<string>4B60F1BCB491FF717C56441AE7783C74F417BE48</string>
+			<key>IDESourceControlWCCName</key>
+			<string>HardcoreData</string>
+		</dict>
+	</array>
+</dict>
+</plist>

CoreStore.xcodeproj/xcshareddata/xcschemes/CoreStore OSX.xcscheme

@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0800"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "B52DD1731BE1F8CC00949AFE"
+               BuildableName = "CoreStore.framework"
+               BlueprintName = "CoreStore OSX"
+               ReferencedContainer = "container:CoreStore.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "B52DD17C1BE1F8CC00949AFE"
+               BuildableName = "CoreStoreTests.xctest"
+               BlueprintName = "CoreStoreTests OSX"
+               ReferencedContainer = "container:CoreStore.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "B52DD1731BE1F8CC00949AFE"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore OSX"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "B52DD1731BE1F8CC00949AFE"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore OSX"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "B52DD1731BE1F8CC00949AFE"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore OSX"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

CoreStore.xcodeproj/xcshareddata/xcschemes/CoreStore iOS.xcscheme

@@ -0,0 +1,118 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0800"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "2F03A52F19C5C6DA005002A5"
+               BuildableName = "CoreStore.framework"
+               BlueprintName = "CoreStore iOS"
+               ReferencedContainer = "container:CoreStore.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "NO"
+            buildForProfiling = "NO"
+            buildForArchiving = "NO"
+            buildForAnalyzing = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "2F03A53A19C5C6DA005002A5"
+               BuildableName = "CoreStoreTests.xctest"
+               BlueprintName = "CoreStoreTests iOS"
+               ReferencedContainer = "container:CoreStore.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "2F03A53A19C5C6DA005002A5"
+               BuildableName = "CoreStoreTests.xctest"
+               BlueprintName = "CoreStoreTests iOS"
+               ReferencedContainer = "container:CoreStore.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "2F03A52F19C5C6DA005002A5"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore iOS"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+         <AdditionalOption
+            key = "NSZombieEnabled"
+            value = "YES"
+            isEnabled = "YES">
+         </AdditionalOption>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "2F03A52F19C5C6DA005002A5"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore iOS"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "2F03A52F19C5C6DA005002A5"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore iOS"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Release">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

CoreStore.xcodeproj/xcshareddata/xcschemes/CoreStore tvOS.xcscheme

@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0800"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "82BA18881C4BBCBA00A0916E"
+               BuildableName = "CoreStore.framework"
+               BlueprintName = "CoreStore tvOS"
+               ReferencedContainer = "container:CoreStore.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "82BA18911C4BBCBA00A0916E"
+               BuildableName = "CoreStoreTests.xctest"
+               BlueprintName = "CoreStoreTests tvOS"
+               ReferencedContainer = "container:CoreStore.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "82BA18881C4BBCBA00A0916E"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore tvOS"
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+   </TestAction>
+   <LaunchAction
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+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
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+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
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+            BlueprintIdentifier = "82BA18881C4BBCBA00A0916E"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore tvOS"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
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+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "82BA18881C4BBCBA00A0916E"
+            BuildableName = "CoreStore.framework"
+            BlueprintName = "CoreStore tvOS"
+            ReferencedContainer = "container:CoreStore.xcodeproj">
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+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
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+      revealArchiveInOrganizer = "YES">
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+</Scheme>

CoreStore.xcodeproj/xcshareddata/xcschemes/CoreStore watchOS.xcscheme

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+      buildImplicitDependencies = "YES">
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+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
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+               BlueprintIdentifier = "B563216E1BD65082006C9394"
+               BuildableName = "CoreStore.framework"
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+               ReferencedContainer = "container:CoreStore.xcodeproj">
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+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
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+      <AdditionalOptions>
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+   </TestAction>
+   <LaunchAction
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+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
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+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
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CoreStore.xcworkspace/contents.xcworkspacedata

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+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:CoreStore.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:CoreStoreDemo/CoreStoreDemo.xcodeproj">
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+</Workspace>

CoreStore.xcworkspace/xcshareddata/CoreStore.xcscmblueprint

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+  "DVTSourceControlWorkspaceBlueprintVersion" : 204,
+  "DVTSourceControlWorkspaceBlueprintRelativePathToProjectKey" : "CoreStore.xcworkspace",
+  "DVTSourceControlWorkspaceBlueprintRemoteRepositoriesKey" : [
+    {
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryURLKey" : "https:\/\/github.com\/JohnEstropia\/CoreStore",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositorySystemKey" : "com.apple.dt.Xcode.sourcecontrol.Git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryIdentifierKey" : "4B60F1BCB491FF717C56441AE7783C74F417BE48"
+    },
+    {
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryURLKey" : "https:\/\/github.com\/JohnEstropia\/GCDKit.git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositorySystemKey" : "com.apple.dt.Xcode.sourcecontrol.Git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryIdentifierKey" : "8B2E522D57154DFA93A06982C36315ECBEA4FA97"
+    },
+    {
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryURLKey" : "https:\/\/github.com\/Quick\/Nimble.git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositorySystemKey" : "com.apple.dt.Xcode.sourcecontrol.Git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryIdentifierKey" : "95438028B10BBB846574013D29F154A00556A9D1"
+    }
+  ]
+}

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CoreStoreDemo/CoreStoreDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata

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+<Workspace
+   version = "1.0">
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+   </FileRef>
+</Workspace>

CoreStoreDemo/CoreStoreDemo.xcodeproj/project.xcworkspace/xcshareddata/CoreStoreDemo.xccheckout

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+		<key>8B2E522D57154DFA93A06982C36315ECBEA4FA97</key>
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+	<key>IDESourceControlProjectVersion</key>
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+</plist>

CoreStoreDemo/CoreStoreDemo.xcodeproj/project.xcworkspace/xcshareddata/CoreStoreDemo.xcscmblueprint

@@ -0,0 +1,30 @@
+{
+  "DVTSourceControlWorkspaceBlueprintPrimaryRemoteRepositoryKey" : "4B60F1BCB491FF717C56441AE7783C74F417BE48",
+  "DVTSourceControlWorkspaceBlueprintWorkingCopyRepositoryLocationsKey" : {
+
+  },
+  "DVTSourceControlWorkspaceBlueprintWorkingCopyStatesKey" : {
+    "8B2E522D57154DFA93A06982C36315ECBEA4FA97" : 0,
+    "4B60F1BCB491FF717C56441AE7783C74F417BE48" : 0
+  },
+  "DVTSourceControlWorkspaceBlueprintIdentifierKey" : "B6855E48-4B19-4321-B1C7-CB2706E12777",
+  "DVTSourceControlWorkspaceBlueprintWorkingCopyPathsKey" : {
+    "8B2E522D57154DFA93A06982C36315ECBEA4FA97" : "CoreStoreLibraries\/GCDKit",
+    "4B60F1BCB491FF717C56441AE7783C74F417BE48" : "CoreStore"
+  },
+  "DVTSourceControlWorkspaceBlueprintNameKey" : "CoreStoreDemo",
+  "DVTSourceControlWorkspaceBlueprintVersion" : 203,
+  "DVTSourceControlWorkspaceBlueprintRelativePathToProjectKey" : "CoreStoreDemo\/CoreStoreDemo.xcodeproj",
+  "DVTSourceControlWorkspaceBlueprintRemoteRepositoriesKey" : [
+    {
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryURLKey" : "github.com:JohnEstropia\/CoreStore.git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositorySystemKey" : "com.apple.dt.Xcode.sourcecontrol.Git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryIdentifierKey" : "4B60F1BCB491FF717C56441AE7783C74F417BE48"
+    },
+    {
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryURLKey" : "github.com:JohnEstropia\/GCDKit.git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositorySystemKey" : "com.apple.dt.Xcode.sourcecontrol.Git",
+      "DVTSourceControlWorkspaceBlueprintRemoteRepositoryIdentifierKey" : "8B2E522D57154DFA93A06982C36315ECBEA4FA97"
+    }
+  ]
+}

CoreStoreDemo/CoreStoreDemo.xcodeproj/project.xcworkspace/xcshareddata/HardcoreDataDemo.xccheckout

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDESourceControlProjectFavoriteDictionaryKey</key>
+	<false/>
+	<key>IDESourceControlProjectIdentifier</key>
+	<string>7C5E31AC-5DD0-43DA-A5C6-AF73B4532D86</string>
+	<key>IDESourceControlProjectName</key>
+	<string>project</string>
+	<key>IDESourceControlProjectOriginsDictionary</key>
+	<dict>
+		<key>4B60F1BCB491FF717C56441AE7783C74F417BE48</key>
+		<string>github.com:JohnEstropia/HardcoreData.git</string>
+		<key>8B2E522D57154DFA93A06982C36315ECBEA4FA97</key>
+		<string>github.com:JohnEstropia/GCDKit.git</string>
+	</dict>
+	<key>IDESourceControlProjectPath</key>
+	<string>HardcoreDataDemo/HardcoreDataDemo.xcodeproj/project.xcworkspace</string>
+	<key>IDESourceControlProjectRelativeInstallPathDictionary</key>
+	<dict>
+		<key>4B60F1BCB491FF717C56441AE7783C74F417BE48</key>
+		<string>../../..</string>
+		<key>8B2E522D57154DFA93A06982C36315ECBEA4FA97</key>
+		<string>../../..Libraries/GCDKit</string>
+	</dict>
+	<key>IDESourceControlProjectURL</key>
+	<string>github.com:JohnEstropia/HardcoreData.git</string>
+	<key>IDESourceControlProjectVersion</key>
+	<integer>111</integer>
+	<key>IDESourceControlProjectWCCIdentifier</key>
+	<string>4B60F1BCB491FF717C56441AE7783C74F417BE48</string>
+	<key>IDESourceControlProjectWCConfigurations</key>
+	<array>
+		<dict>
+			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
+			<string>public.vcs.git</string>
+			<key>IDESourceControlWCCIdentifierKey</key>
+			<string>8B2E522D57154DFA93A06982C36315ECBEA4FA97</string>
+			<key>IDESourceControlWCCName</key>
+			<string>GCDKit</string>
+		</dict>
+		<dict>
+			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
+			<string>public.vcs.git</string>
+			<key>IDESourceControlWCCIdentifierKey</key>
+			<string>4B60F1BCB491FF717C56441AE7783C74F417BE48</string>
+			<key>IDESourceControlWCCName</key>
+			<string>HardcoreData</string>
+		</dict>
+	</array>
+</dict>
+</plist>

CoreStoreDemo/CoreStoreDemo.xcodeproj/project.xcworkspace/xcuserdata/johnestropia.xcuserdatad/WorkspaceSettings.xcsettings

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>HasAskedToTakeAutomaticSnapshotBeforeSignificantChanges</key>
+	<true/>
+	<key>SnapshotAutomaticallyBeforeSignificantChanges</key>
+	<true/>
+</dict>
+</plist>

CoreStoreDemo/CoreStoreDemo.xcodeproj/xcshareddata/xcschemes/CoreStoreDemo.xcscheme

@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0800"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "B54AAD481AF4D26E00848AE0"
+               BuildableName = "CoreStoreDemo.app"
+               BlueprintName = "CoreStoreDemo"
+               ReferencedContainer = "container:CoreStoreDemo.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "B54AAD481AF4D26E00848AE0"
+            BuildableName = "CoreStoreDemo.app"
+            BlueprintName = "CoreStoreDemo"
+            ReferencedContainer = "container:CoreStoreDemo.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "B54AAD481AF4D26E00848AE0"
+            BuildableName = "CoreStoreDemo.app"
+            BlueprintName = "CoreStoreDemo"
+            ReferencedContainer = "container:CoreStoreDemo.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "B54AAD481AF4D26E00848AE0"
+            BuildableName = "CoreStoreDemo.app"
+            BlueprintName = "CoreStoreDemo"
+            ReferencedContainer = "container:CoreStoreDemo.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

CoreStoreDemo/CoreStoreDemo/AppDelegate.swift

@@ -0,0 +1,28 @@
+//
+//  AppDelegate.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/02.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+
+import CoreStore
+
+// MARK: - AppDelegate
+
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+    // MARK: UIApplicationDelegate
+    
+    var window: UIWindow?
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]? = nil) -> Bool {
+        
+        application.statusBarStyle = .lightContent
+        return true
+    }
+}
+

CoreStoreDemo/CoreStoreDemo/Base.lproj/LaunchScreen.xib

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="10112" systemVersion="15D21" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10083"/>
+        <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <view contentMode="scaleToFill" id="iN0-l3-epB">
+            <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
+            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+            <subviews>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright © 2015 John Rommel Estropia. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="8ie-xW-0ye">
+                    <rect key="frame" x="20" y="439" width="441" height="21"/>
+                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                    <color key="textColor" red="0.92549019607843142" green="0.94117647058823528" blue="0.94509803921568625" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    <nil key="highlightedColor"/>
+                </label>
+                <imageView userInteractionEnabled="NO" contentMode="center" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="CoreStoreIcon" translatesAutoresizingMaskIntoConstraints="NO" id="q8C-V6-gXH">
+                    <rect key="frame" x="155" y="83" width="170" height="170"/>
+                </imageView>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="CoreStore" textAlignment="center" lineBreakMode="middleTruncation" baselineAdjustment="alignBaselines" minimumFontSize="18" translatesAutoresizingMaskIntoConstraints="NO" id="kId-c2-rCX">
+                    <rect key="frame" x="20" y="273" width="440" height="57.5"/>
+                    <fontDescription key="fontDescription" name="HelveticaNeue-UltraLight" family="Helvetica Neue" pointSize="50"/>
+                    <color key="textColor" red="0.92549019607843142" green="0.94117647058823528" blue="0.94509803921568625" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    <nil key="highlightedColor"/>
+                </label>
+            </subviews>
+            <color key="backgroundColor" red="0.20392156862745098" green="0.28627450980392155" blue="0.36862745098039218" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+            <constraints>
+                <constraint firstAttribute="centerX" secondItem="kId-c2-rCX" secondAttribute="centerX" id="Koa-jz-hwk"/>
+                <constraint firstAttribute="bottom" secondItem="8ie-xW-0ye" secondAttribute="bottom" constant="20" id="Kzo-t9-V3l"/>
+                <constraint firstItem="8ie-xW-0ye" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="MfP-vx-nX0"/>
+                <constraint firstItem="q8C-V6-gXH" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="centerY" multiplier="0.7" id="QW6-8Y-w15"/>
+                <constraint firstAttribute="centerX" secondItem="8ie-xW-0ye" secondAttribute="centerX" id="ZEH-qu-HZ9"/>
+                <constraint firstItem="q8C-V6-gXH" firstAttribute="centerX" secondItem="iN0-l3-epB" secondAttribute="centerX" id="fRb-1V-9iD"/>
+                <constraint firstItem="kId-c2-rCX" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="fvb-Df-36g"/>
+                <constraint firstItem="kId-c2-rCX" firstAttribute="top" secondItem="q8C-V6-gXH" secondAttribute="bottom" constant="20" id="s63-MP-ush"/>
+            </constraints>
+            <nil key="simulatedStatusBarMetrics"/>
+            <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+            <point key="canvasLocation" x="548" y="455"/>
+        </view>
+    </objects>
+    <resources>
+        <image name="CoreStoreIcon" width="170" height="170"/>
+    </resources>
+</document>

CoreStoreDemo/CoreStoreDemo/Base.lproj/LaunchScreen.xib.orig

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<<<<<<< Updated upstream
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="9531" systemVersion="15C50" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9529"/>
+=======
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="9532" systemVersion="15D21" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9530"/>
+>>>>>>> Stashed changes
+        <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <view contentMode="scaleToFill" id="iN0-l3-epB">
+            <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
+            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+            <subviews>
+<<<<<<< Updated upstream
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright © 2015 John Rommel Estropia. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="8ie-xW-0ye">
+                    <rect key="frame" x="20" y="439" width="441" height="21"/>
+=======
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) 2015 John Rommel Estropia. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="8ie-xW-0ye">
+                    <rect key="frame" x="20" y="439.5" width="441" height="20.5"/>
+>>>>>>> Stashed changes
+                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                    <color key="textColor" red="0.92549019607843142" green="0.94117647058823528" blue="0.94509803921568625" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    <nil key="highlightedColor"/>
+                </label>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="CoreStore" textAlignment="center" lineBreakMode="middleTruncation" baselineAdjustment="alignBaselines" minimumFontSize="18" translatesAutoresizingMaskIntoConstraints="NO" id="kId-c2-rCX">
+                    <rect key="frame" x="20" y="133" width="441" height="57.5"/>
+                    <fontDescription key="fontDescription" name="HelveticaNeue-UltraLight" family="Helvetica Neue" pointSize="50"/>
+                    <color key="textColor" red="0.92549019607843142" green="0.94117647058823528" blue="0.94509803921568625" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    <nil key="highlightedColor"/>
+                </label>
+            </subviews>
+            <color key="backgroundColor" red="0.20392156862745098" green="0.28627450980392155" blue="0.36862745098039218" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+            <constraints>
+                <constraint firstItem="kId-c2-rCX" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="bottom" multiplier="1/3" constant="1" id="5cJ-9S-tgC"/>
+                <constraint firstAttribute="centerX" secondItem="kId-c2-rCX" secondAttribute="centerX" id="Koa-jz-hwk"/>
+                <constraint firstAttribute="bottom" secondItem="8ie-xW-0ye" secondAttribute="bottom" constant="20" id="Kzo-t9-V3l"/>
+                <constraint firstItem="8ie-xW-0ye" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="MfP-vx-nX0"/>
+                <constraint firstAttribute="centerX" secondItem="8ie-xW-0ye" secondAttribute="centerX" id="ZEH-qu-HZ9"/>
+                <constraint firstItem="kId-c2-rCX" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="fvb-Df-36g"/>
+            </constraints>
+            <nil key="simulatedStatusBarMetrics"/>
+            <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
+            <point key="canvasLocation" x="548" y="455"/>
+        </view>
+    </objects>
+</document>

CoreStoreDemo/CoreStoreDemo/CoreStoreDemo.xcdatamodeld/CoreStoreDemo.xcdatamodel/contents

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model userDefinedModelVersionIdentifier="" type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="10169.1" systemVersion="15D21" minimumToolsVersion="Automatic">
+    <entity name="Palette" representedClassName="CoreStoreDemo.Palette">
+        <attribute name="brightness" optional="YES" attributeType="Float" defaultValueString="0.0" syncable="YES"/>
+        <attribute name="colorName" optional="YES" transient="YES" attributeType="String" syncable="YES"/>
+        <attribute name="hue" optional="YES" attributeType="Integer 32" defaultValueString="0.0" syncable="YES"/>
+        <attribute name="saturation" optional="YES" attributeType="Float" defaultValueString="0.0" syncable="YES"/>
+        <userInfo/>
+    </entity>
+    <entity name="Place" representedClassName="CoreStoreDemo.Place" syncable="YES">
+        <attribute name="latitude" optional="YES" attributeType="Double" defaultValueString="0.0" syncable="YES"/>
+        <attribute name="longitude" optional="YES" attributeType="Double" defaultValueString="0.0" syncable="YES"/>
+        <attribute name="subtitle" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="title" optional="YES" attributeType="String" syncable="YES"/>
+    </entity>
+    <entity name="TimeZone" representedClassName="CoreStoreDemo.TimeZone" syncable="YES">
+        <attribute name="abbreviation" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="daylightSavingTimeOffset" optional="YES" attributeType="Double" defaultValueString="0.0" syncable="YES"/>
+        <attribute name="hasDaylightSavingTime" optional="YES" attributeType="Boolean" syncable="YES"/>
+        <attribute name="name" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="secondsFromGMT" optional="YES" attributeType="Integer 32" defaultValueString="0.0" syncable="YES"/>
+    </entity>
+    <configuration name="FetchingAndQueryingDemo">
+        <memberEntity name="TimeZone"/>
+    </configuration>
+    <configuration name="ObservingDemo">
+        <memberEntity name="Palette"/>
+    </configuration>
+    <configuration name="TransactionsDemo">
+        <memberEntity name="Place"/>
+    </configuration>
+    <elements>
+        <element name="Palette" positionX="261" positionY="189" width="128" height="105"/>
+        <element name="Place" positionX="261" positionY="225" width="128" height="105"/>
+        <element name="TimeZone" positionX="297" positionY="270" width="128" height="120"/>
+    </elements>
+</model>

CoreStoreDemo/CoreStoreDemo/Fetching and Querying Demo/FetchingAndQueryingDemoViewController.swift

@@ -0,0 +1,291 @@
+//
+//  FetchingAndQueryingDemoViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/12.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+import CoreStore
+
+
+private struct Static {
+    
+    static let timeZonesStack: DataStack = {
+        
+        let dataStack = DataStack()
+        try! dataStack.addStorageAndWait(
+            SQLiteStore(
+                fileName: "TimeZoneDemo.sqlite",
+                configuration: "FetchingAndQueryingDemo",
+                localStorageOptions: .recreateStoreOnModelMismatch
+            )
+        )
+        _ = try? dataStack.perform(
+            synchronous: { (transaction) in
+                
+                transaction.deleteAll(From<TimeZone>())
+                
+                for name in NSTimeZone.knownTimeZoneNames {
+                    
+                    let rawTimeZone = NSTimeZone(name: name)!
+                    let cachedTimeZone = transaction.create(Into<TimeZone>())
+                    
+                    cachedTimeZone.name = rawTimeZone.name
+                    cachedTimeZone.abbreviation = rawTimeZone.abbreviation ?? ""
+                    cachedTimeZone.secondsFromGMT = Int32(rawTimeZone.secondsFromGMT)
+                    cachedTimeZone.hasDaylightSavingTime = rawTimeZone.isDaylightSavingTime
+                    cachedTimeZone.daylightSavingTimeOffset = rawTimeZone.daylightSavingTimeOffset
+                }
+            }
+        )
+        return dataStack
+    }()
+}
+
+
+// MARK: - FetchingAndQueryingDemoViewController
+
+class FetchingAndQueryingDemoViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
+    
+    // MARK: UIViewController
+    
+    override func viewDidAppear(_ animated: Bool) {
+        
+        super.viewDidAppear(animated)
+        
+        if self.didAppearOnce {
+            
+            return
+        }
+        
+        self.didAppearOnce = true
+        
+        let alert = UIAlertController(
+            title: "Fetch and Query Demo",
+            message: "This demo shows how to execute fetches and queries.\n\nEach menu item executes and displays a preconfigured fetch/query.",
+            preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
+        self.present(alert, animated: true, completion: nil)
+    }
+    
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
+        
+        super.prepare(for: segue, sender: sender)
+        
+        if let indexPath = sender as? IndexPath {
+            
+            switch segue.destination {
+                
+            case let controller as FetchingResultsViewController:
+                let item = self.fetchingItems[indexPath.row]
+                controller.set(timeZones: item.fetch(), title: item.title)
+                
+            case let controller as QueryingResultsViewController:
+                let item = self.queryingItems[indexPath.row]
+                controller.set(value: item.query(), title: item.title)
+                
+            default:
+                break
+            }
+        }
+    }
+    
+    
+    // MARK: UITableViewDataSource
+    
+    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        
+        switch self.segmentedControl?.selectedSegmentIndex {
+            
+        case Section.fetching.rawValue?:
+            return self.fetchingItems.count
+            
+        case Section.querying.rawValue?:
+            return self.queryingItems.count
+            
+        default:
+            return 0
+        }
+    }
+    
+    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        
+        let cell = tableView.dequeueReusableCell(withIdentifier: "UITableViewCell")!
+        
+        switch self.segmentedControl?.selectedSegmentIndex {
+            
+        case Section.fetching.rawValue?:
+            cell.textLabel?.text = self.fetchingItems[indexPath.row].title
+            
+        case Section.querying.rawValue?:
+            cell.textLabel?.text = self.queryingItems[indexPath.row].title
+            
+        default:
+            cell.textLabel?.text = nil
+        }
+        
+        return cell
+    }
+    
+    
+    // MARK: UITableViewDelegate
+    
+    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        
+        tableView.deselectRow(at: indexPath, animated: true)
+        
+        switch self.segmentedControl?.selectedSegmentIndex {
+            
+        case Section.fetching.rawValue?:
+            self.performSegue(withIdentifier: "FetchingResultsViewController", sender: indexPath)
+            
+        case Section.querying.rawValue?:
+            self.performSegue(withIdentifier: "QueryingResultsViewController", sender: indexPath)
+            
+        default:
+            break
+        }
+    }
+    
+    
+    // MARK: Private
+    
+    private enum Section: Int {
+        
+        case fetching
+        case querying
+    }
+    
+    private let fetchingItems = [
+        (
+            title: "All Time Zones",
+            fetch: { () -> [TimeZone] in
+                
+                return Static.timeZonesStack.fetchAll(
+                    From<TimeZone>(),
+                    OrderBy(.ascending(#keyPath(TimeZone.name)))
+                )!
+            }
+        ),
+        (
+            title: "Time Zones in Asia",
+            fetch: { () -> [TimeZone] in
+                
+                return Static.timeZonesStack.fetchAll(
+                    From<TimeZone>(),
+                    Where("%K BEGINSWITH[c] %@", #keyPath(TimeZone.name), "Asia"),
+                    OrderBy(.ascending(#keyPath(TimeZone.secondsFromGMT)))
+                )!
+            }
+        ),
+        (
+            title: "Time Zones in America and Europe",
+            fetch: { () -> [TimeZone] in
+                
+                return Static.timeZonesStack.fetchAll(
+                    From<TimeZone>(),
+                    Where("%K BEGINSWITH[c] %@", #keyPath(TimeZone.name), "America")
+                        || Where("%K BEGINSWITH[c] %@", #keyPath(TimeZone.name), "Europe"),
+                    OrderBy(.ascending(#keyPath(TimeZone.secondsFromGMT)))
+                )!
+            }
+        ),
+        (
+            title: "All Time Zones Except America",
+            fetch: { () -> [TimeZone] in
+                
+                return Static.timeZonesStack.fetchAll(
+                    From<TimeZone>(),
+                    !Where("%K BEGINSWITH[c] %@", #keyPath(TimeZone.name), "America"),
+                    OrderBy(.ascending(#keyPath(TimeZone.secondsFromGMT)))
+                    )!
+            }
+        ),
+        (
+            title: "Time Zones with Summer Time",
+            fetch: { () -> [TimeZone] in
+                
+                return Static.timeZonesStack.fetchAll(
+                    From<TimeZone>(),
+                    Where("hasDaylightSavingTime", isEqualTo: true),
+                    OrderBy(.ascending(#keyPath(TimeZone.name)))
+                )!
+            }
+        )
+    ]
+    
+    private let queryingItems = [
+        (
+            title: "Number of Time Zones",
+            query: { () -> Any in
+                
+                return Static.timeZonesStack.queryValue(
+                    From<TimeZone>(),
+                    Select<NSNumber>(.count(#keyPath(TimeZone.name)))
+                )!
+            }
+        ),
+        (
+            title: "Abbreviation For Tokyo's Time Zone",
+            query: { () -> Any in
+                
+                return Static.timeZonesStack.queryValue(
+                    From<TimeZone>(),
+                    Select<String>(#keyPath(TimeZone.abbreviation)),
+                    Where("%K ENDSWITH[c] %@", #keyPath(TimeZone.name), "Tokyo")
+                )!
+            }
+        ),
+        (
+            title: "All Abbreviations",
+            query: { () -> Any in
+                
+                return Static.timeZonesStack.queryAttributes(
+                    From<TimeZone>(),
+                    Select<NSDictionary>(#keyPath(TimeZone.name), #keyPath(TimeZone.abbreviation)),
+                    OrderBy(.ascending(#keyPath(TimeZone.name)))
+                )!
+            }
+        ),
+        (
+            title: "Number of Countries per Time Zone",
+            query: { () -> Any in
+                
+                return Static.timeZonesStack.queryAttributes(
+                    From<TimeZone>(),
+                    Select<NSDictionary>(.count(#keyPath(TimeZone.abbreviation)), #keyPath(TimeZone.abbreviation)),
+                    GroupBy(#keyPath(TimeZone.abbreviation)),
+                    OrderBy(.ascending(#keyPath(TimeZone.secondsFromGMT)), .ascending(#keyPath(TimeZone.name)))
+                )!
+            }
+        ),
+        (
+            title: "Number of Countries with Summer Time",
+            query: { () -> Any in
+                
+                return Static.timeZonesStack.queryAttributes(
+                    From<TimeZone>(),
+                    Select<NSDictionary>(
+                        .count(#keyPath(TimeZone.hasDaylightSavingTime), as: "numberOfCountries"),
+                        #keyPath(TimeZone.hasDaylightSavingTime)
+                    ),
+                    GroupBy(#keyPath(TimeZone.hasDaylightSavingTime)),
+                    OrderBy(.descending(#keyPath(TimeZone.hasDaylightSavingTime)))
+                )!
+            }
+        )
+    ]
+    
+    var didAppearOnce = false
+    
+    @IBOutlet dynamic weak var segmentedControl: UISegmentedControl?
+    @IBOutlet dynamic weak var tableView: UITableView?
+    
+    @IBAction dynamic func segmentedControlValueChanged(_ sender: AnyObject?) {
+        
+        self.tableView?.reloadData()
+    }
+}

CoreStoreDemo/CoreStoreDemo/Fetching and Querying Demo/FetchingResultsViewController.swift

@@ -0,0 +1,68 @@
+//
+//  FetchingResultsViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/17.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+
+// MARK: - FetchingResultsViewController
+
+class FetchingResultsViewController: UITableViewController {
+
+    // MARK: Public
+    
+    func set(timeZones: [TimeZone]?, title: String) {
+        
+        self.timeZones += timeZones ?? []
+        self.sectionTitle = title
+        
+        self.tableView?.reloadData()
+    }
+    
+    
+    // MARK: UIViewController
+    
+    override func viewDidLoad() {
+        
+        super.viewDidLoad()
+        
+        self.tableView.estimatedRowHeight = 60
+        self.tableView.rowHeight = UITableViewAutomaticDimension
+    }
+    
+    
+    // MARK: UITableViewDataSource
+    
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        
+        return self.timeZones.count
+    }
+    
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        
+        let cell = tableView.dequeueReusableCell(withIdentifier: "UITableViewCell", for: indexPath)
+        
+        let timeZone = self.timeZones[indexPath.row]
+        cell.textLabel?.text = timeZone.name
+        cell.detailTextLabel?.text = timeZone.abbreviation
+        
+        return cell
+    }
+    
+    
+    // MARK: UITableViewDelegate
+    
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+        
+        return self.sectionTitle
+    }
+    
+    
+    // MARK: Private
+    
+    var timeZones = [TimeZone]()
+    var sectionTitle: String?
+}

CoreStoreDemo/CoreStoreDemo/Fetching and Querying Demo/QueryingResultsViewController.swift

@@ -0,0 +1,88 @@
+//
+//  QueryingResultsViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/17.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+
+class QueryingResultsViewController: UITableViewController {
+    
+    // MARK: Public
+    
+    func set(value: Any?, title: String) {
+        
+        switch value {
+            
+        case (let array as [Any])?:
+            self.values = array.map { (item: Any) -> (title: String, detail: String) in
+                (
+                    title: String(describing: item),
+                    detail: String(reflecting: type(of: item))
+                )
+            }
+            
+        case let item?:
+            self.values = [
+                (
+                    title: String(describing: item),
+                    detail: String(reflecting: type(of: item))
+                )
+            ]
+            
+        default:
+            self.values = []
+        }
+        
+        self.sectionTitle = title
+        
+        self.tableView?.reloadData()
+    }
+    
+    
+    // MARK: UIViewController
+    
+    override func viewDidLoad() {
+        
+        super.viewDidLoad()
+        
+        self.tableView.estimatedRowHeight = 60
+        self.tableView.rowHeight = UITableViewAutomaticDimension
+    }
+    
+    
+    // MARK: UITableViewDataSource
+    
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        
+        return self.values.count
+    }
+    
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        
+        let cell = tableView.dequeueReusableCell(withIdentifier: "UITableViewCell", for: indexPath)
+        
+        let value = self.values[indexPath.row]
+        
+        cell.textLabel?.text = value.title
+        cell.detailTextLabel?.text = value.detail
+        
+        return cell
+    }
+    
+    
+    // MARK: UITableViewDelegate
+    
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+        
+        return self.sectionTitle
+    }
+    
+    
+    // MARK: Private
+    
+    var values: [(title: String, detail: String)] = []
+    var sectionTitle: String?
+}

CoreStoreDemo/CoreStoreDemo/Fetching and Querying Demo/TimeZone.swift

@@ -0,0 +1,20 @@
+//
+//  TimeZone.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/15.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+class TimeZone: NSManagedObject {
+
+    @NSManaged var secondsFromGMT: Int32
+    @NSManaged var abbreviation: String
+    @NSManaged var hasDaylightSavingTime: Bool
+    @NSManaged var daylightSavingTimeOffset: Double
+    @NSManaged var name: String
+
+}

CoreStoreDemo/CoreStoreDemo/Images.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,58 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-60@3x-1.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-76.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "car",
+      "filename" : "Icon-60@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

CoreStoreDemo/CoreStoreDemo/Images.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

CoreStoreDemo/CoreStoreDemo/Images.xcassets/CoreStoreIcon.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "CoreStoreIcon@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

CoreStoreDemo/CoreStoreDemo/Images.xcassets/first.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "first.pdf"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

CoreStoreDemo/CoreStoreDemo/Images.xcassets/second.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "second.pdf"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

CoreStoreDemo/CoreStoreDemo/Info.plist

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleDisplayName</key>
+	<string>CoreStore</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0.1</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UIStatusBarStyle</key>
+	<string>UIStatusBarStyleLightContent</string>
+	<key>UIStatusBarTintParameters</key>
+	<dict>
+		<key>UINavigationBar</key>
+		<dict>
+			<key>Style</key>
+			<string>UIBarStyleDefault</string>
+			<key>Translucent</key>
+			<false/>
+		</dict>
+	</dict>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+	</array>
+	<key>UIViewControllerBasedStatusBarAppearance</key>
+	<false/>
+</dict>
+</plist>

CoreStoreDemo/CoreStoreDemo/List and Object Observers Demo/ListObserverDemoViewController.swift

@@ -0,0 +1,315 @@
+//
+//  ListObserverDemoViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/02.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+import CoreStore
+
+
+private struct Static {
+    
+    enum Filter: String {
+        
+        case all = "All Colors"
+        case light = "Light Colors"
+        case dark = "Dark Colors"
+        
+        func next() -> Filter {
+            
+            switch self {
+                
+            case .all: return .light
+            case .light: return .dark
+            case .dark: return .all
+            }
+        }
+        
+        func whereClause() -> Where {
+            
+            switch self {
+                
+            case .all: return Where(true)
+            case .light: return Where("%K >= %@", #keyPath(Palette.brightness), 0.9)
+            case .dark: return Where("%K <= %@", #keyPath(Palette.brightness), 0.4)
+            }
+        }
+    }
+    
+    static var filter = Filter.all {
+        
+        didSet {
+            
+            self.palettes.refetch(
+                self.filter.whereClause(),
+                OrderBy(.ascending(#keyPath(Palette.hue)))
+            )
+        }
+    }
+    
+    static let palettes: ListMonitor<Palette> = {
+        
+        try! CoreStore.addStorageAndWait(
+            SQLiteStore(
+                fileName: "ColorsDemo.sqlite",
+                configuration: "ObservingDemo",
+                localStorageOptions: .recreateStoreOnModelMismatch
+            )
+        )
+        
+        return CoreStore.monitorSectionedList(
+            From<Palette>(),
+            SectionBy(#keyPath(Palette.colorName)),
+            OrderBy(.ascending(#keyPath(Palette.hue)))
+        )
+    }()
+}
+
+
+// MARK: - ListObserverDemoViewController
+
+class ListObserverDemoViewController: UITableViewController, ListSectionObserver {
+    
+    // MARK: NSObject
+    
+    deinit {
+        
+        Static.palettes.removeObserver(self)
+    }
+    
+    
+    // MARK: UIViewController
+
+    override func viewDidLoad() {
+        
+        super.viewDidLoad()
+        
+        let navigationItem = self.navigationItem
+        navigationItem.leftBarButtonItems = [
+            self.editButtonItem,
+            UIBarButtonItem(
+                barButtonSystemItem: .trash,
+                target: self,
+                action: #selector(self.resetBarButtonItemTouched(_:))
+            )
+        ]
+        
+        let filterBarButton = UIBarButtonItem(
+            title: Static.filter.rawValue,
+            style: .plain,
+            target: self,
+            action: #selector(self.filterBarButtonItemTouched(_:))
+        )
+        navigationItem.rightBarButtonItems = [
+            UIBarButtonItem(
+                barButtonSystemItem: .add,
+                target: self,
+                action: #selector(self.addBarButtonItemTouched(_:))
+            ),
+            filterBarButton
+        ]
+        self.filterBarButton = filterBarButton
+        
+        Static.palettes.addObserver(self)
+        
+        self.setTable(enabled: !Static.palettes.isPendingRefetch)
+    }
+    
+    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
+        
+        super.prepare(for: segue, sender: sender)
+        
+        switch (segue.identifier, segue.destination, sender) {
+            
+        case ("ObjectObserverDemoViewController"?, let destinationViewController as ObjectObserverDemoViewController, let palette as Palette):
+            destinationViewController.palette = palette
+            
+        default:
+            break
+        }
+    }
+    
+    
+    // MARK: UITableViewDataSource
+    
+    override func numberOfSections(in tableView: UITableView) -> Int {
+        
+        return Static.palettes.numberOfSections()
+    }
+
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        
+        return Static.palettes.numberOfObjectsInSection(section)
+    }
+    
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        
+        let cell = tableView.dequeueReusableCell(withIdentifier: "PaletteTableViewCell") as! PaletteTableViewCell
+        
+        let palette = Static.palettes[indexPath]
+        cell.colorView?.backgroundColor = palette.color
+        cell.label?.text = palette.colorText
+        
+        return cell
+    }
+    
+    
+    // MARK: UITableViewDelegate
+    
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        
+        tableView.deselectRow(at: indexPath, animated: true)
+        
+        self.performSegue(
+            withIdentifier: "ObjectObserverDemoViewController",
+            sender: Static.palettes[indexPath]
+        )
+    }
+    
+    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
+        
+        switch editingStyle {
+            
+        case .delete:
+            let palette = Static.palettes[indexPath]
+            CoreStore.perform(
+                asynchronous: { (transaction) in
+                    
+                    transaction.delete(palette)
+                },
+                completion: { _ in }
+            )
+            
+        default:
+            break
+        }
+    }
+    
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+        
+        return Static.palettes.sectionInfoAtIndex(section).name
+    }
+    
+    
+    // MARK: ListObserver
+    
+    func listMonitorWillChange(_ monitor: ListMonitor<Palette>) {
+        
+        self.tableView.beginUpdates()
+    }
+    
+    func listMonitorDidChange(_ monitor: ListMonitor<Palette>) {
+        
+        self.tableView.endUpdates()
+    }
+    
+    func listMonitorWillRefetch(_ monitor: ListMonitor<Palette>) {
+        
+        self.setTable(enabled: false)
+    }
+    
+    func listMonitorDidRefetch(_ monitor: ListMonitor<Palette>) {
+        
+        self.filterBarButton?.title = Static.filter.rawValue
+        self.tableView.reloadData()
+        self.setTable(enabled: true)
+    }
+    
+    
+    // MARK: ListObjectObserver
+    
+    func listMonitor(_ monitor: ListMonitor<Palette>, didInsertObject object: Palette, toIndexPath indexPath: IndexPath) {
+        
+        self.tableView.insertRows(at: [indexPath], with: .automatic)
+    }
+    
+    func listMonitor(_ monitor: ListMonitor<Palette>, didDeleteObject object: Palette, fromIndexPath indexPath: IndexPath) {
+        
+        self.tableView.deleteRows(at: [indexPath], with: .automatic)
+    }
+    
+    func listMonitor(_ monitor: ListMonitor<Palette>, didUpdateObject object: Palette, atIndexPath indexPath: IndexPath) {
+        
+        if let cell = self.tableView.cellForRow(at: indexPath) as? PaletteTableViewCell {
+            
+            let palette = Static.palettes[indexPath]
+            cell.colorView?.backgroundColor = palette.color
+            cell.label?.text = palette.colorText
+        }
+    }
+    
+    func listMonitor(_ monitor: ListMonitor<Palette>, didMoveObject object: Palette, fromIndexPath: IndexPath, toIndexPath: IndexPath) {
+        
+        self.tableView.deleteRows(at: [fromIndexPath], with: .automatic)
+        self.tableView.insertRows(at: [toIndexPath], with: .automatic)
+    }
+    
+    
+    // MARK: ListSectionObserver
+    
+    func listMonitor(_ monitor: ListMonitor<Palette>, didInsertSection sectionInfo: NSFetchedResultsSectionInfo, toSectionIndex sectionIndex: Int) {
+        
+        self.tableView.insertSections(IndexSet(integer: sectionIndex), with: .automatic)
+    }
+    
+    
+    func listMonitor(_ monitor: ListMonitor<Palette>, didDeleteSection sectionInfo: NSFetchedResultsSectionInfo, fromSectionIndex sectionIndex: Int) {
+        
+        self.tableView.deleteSections(IndexSet(integer: sectionIndex), with: .automatic)
+    }
+    
+    
+    // MARK: Private
+    
+    private var filterBarButton: UIBarButtonItem?
+    
+    @IBAction private dynamic func resetBarButtonItemTouched(_ sender: AnyObject?) {
+        
+        CoreStore.perform(
+            asynchronous: { (transaction) in
+                
+                transaction.deleteAll(From<Palette>())
+            },
+            completion: { _ in }
+        )
+    }
+    
+    @IBAction private dynamic func filterBarButtonItemTouched(_ sender: AnyObject?) {
+        
+        Static.filter = Static.filter.next()
+    }
+    
+    @IBAction private dynamic func addBarButtonItemTouched(_ sender: AnyObject?) {
+        
+        CoreStore.perform(
+            asynchronous: { (transaction) in
+                
+                let palette = transaction.create(Into<Palette>())
+                palette.setInitialValues()
+            },
+            completion: { _ in }
+        )
+    }
+    
+    private func setTable(enabled: Bool) {
+        
+        UIView.animate(
+            withDuration: 0.2,
+            delay: 0,
+            options: .beginFromCurrentState,
+            animations: { () -> Void in
+                
+                if let tableView = self.tableView {
+                    
+                    tableView.alpha = enabled ? 1.0 : 0.5
+                    tableView.isUserInteractionEnabled = enabled
+                }
+            },
+            completion: nil
+        )
+    }
+}
+

CoreStoreDemo/CoreStoreDemo/List and Object Observers Demo/ObjectObserverDemoViewController.swift

@@ -0,0 +1,200 @@
+//
+//  ObjectObserverDemoViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/06.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+import CoreStore
+
+
+// MARK: - ObjectObserverDemoViewController
+
+class ObjectObserverDemoViewController: UIViewController, ObjectObserver {
+    
+    var palette: Palette? {
+        
+        get {
+            
+            return self.monitor?.object
+        }
+        set {
+            
+            guard self.monitor?.object != newValue else {
+                
+                return
+            }
+            
+            if let palette = newValue {
+                
+                self.monitor = CoreStore.monitorObject(palette)
+            }
+            else {
+                
+                self.monitor = nil
+            }
+        }
+    }
+    
+    // MARK: NSObject
+    
+    deinit {
+        
+        self.monitor?.removeObserver(self)
+    }
+    
+
+    // MARK: UIViewController
+    
+    required init?(coder aDecoder: NSCoder) {
+        
+        if let palette = CoreStore.fetchOne(From<Palette>(), OrderBy(.ascending(#keyPath(Palette.hue)))) {
+            
+            self.monitor = CoreStore.monitorObject(palette)
+        }
+        else {
+            
+            _ = try? CoreStore.perform(
+                synchronous: { (transaction) in
+                    
+                    let palette = transaction.create(Into(Palette.self))
+                    palette.setInitialValues()
+                }
+            )
+            
+            let palette = CoreStore.fetchOne(From<Palette>(), OrderBy(.ascending(#keyPath(Palette.hue))))!
+            self.monitor = CoreStore.monitorObject(palette)
+        }
+        
+        super.init(coder: aDecoder)
+    }
+    
+    override func viewDidLoad() {
+        
+        super.viewDidLoad()
+        self.monitor?.addObserver(self)
+        
+        if let palette = self.monitor?.object {
+            
+            self.reloadPaletteInfo(palette, changedKeys: nil)
+        }
+    }
+    
+    
+    // MARK: ObjectObserver
+    
+    func objectMonitor(_ monitor: ObjectMonitor<Palette>, didUpdateObject object: Palette, changedPersistentKeys: Set<KeyPath>) {
+        
+        self.reloadPaletteInfo(object, changedKeys: changedPersistentKeys)
+    }
+    
+    func objectMonitor(_ monitor: ObjectMonitor<Palette>, didDeleteObject object: Palette) {
+        
+        self.navigationItem.rightBarButtonItem?.isEnabled = false
+        
+        self.colorNameLabel?.alpha = 0.3
+        self.colorView?.alpha = 0.3
+        
+        self.hsbLabel?.text = "Deleted"
+        self.hsbLabel?.textColor = UIColor.red
+        
+        self.hueSlider?.isEnabled = false
+        self.saturationSlider?.isEnabled = false
+        self.brightnessSlider?.isEnabled = false
+    }
+
+    
+    // MARK: Private
+    
+    var monitor: ObjectMonitor<Palette>?
+    
+    @IBOutlet weak var colorNameLabel: UILabel?
+    @IBOutlet weak var colorView: UIView?
+    @IBOutlet weak var hsbLabel: UILabel?
+    @IBOutlet weak var dateLabel: UILabel?
+    @IBOutlet weak var hueSlider: UISlider?
+    @IBOutlet weak var saturationSlider: UISlider?
+    @IBOutlet weak var brightnessSlider: UISlider?
+    
+    @IBAction dynamic func hueSliderValueDidChange(_ sender: AnyObject?) {
+        
+        let hue = self.hueSlider?.value ?? 0
+        CoreStore.perform(
+            asynchronous: { [weak self] (transaction) in
+                
+                if let palette = transaction.edit(self?.monitor?.object) {
+                    
+                    palette.hue = Int32(hue)
+                }
+            },
+            completion: { _ in }
+        )
+    }
+    
+    @IBAction dynamic func saturationSliderValueDidChange(_ sender: AnyObject?) {
+        
+        let saturation = self.saturationSlider?.value ?? 0
+        CoreStore.perform(
+            asynchronous: { [weak self] (transaction) in
+                
+                if let palette = transaction.edit(self?.monitor?.object) {
+                    
+                    palette.saturation = saturation
+                }
+            },
+            completion: { _ in }
+        )
+    }
+    
+    @IBAction dynamic func brightnessSliderValueDidChange(_ sender: AnyObject?) {
+        
+        let brightness = self.brightnessSlider?.value ?? 0
+        CoreStore.perform(
+            asynchronous: { [weak self] (transaction) in
+                
+                if let palette = transaction.edit(self?.monitor?.object) {
+                    
+                    palette.brightness = brightness
+                }
+            },
+            completion: { _ in }
+        )
+    }
+    
+    @IBAction dynamic func deleteBarButtonTapped(_ sender: AnyObject?) {
+        
+        CoreStore.perform(
+            asynchronous: { [weak self] (transaction) in
+                
+                transaction.delete(self?.monitor?.object)
+            },
+            completion: { _ in }
+        )
+    }
+    
+    func reloadPaletteInfo(_ palette: Palette, changedKeys: Set<String>?) {
+        
+        self.colorNameLabel?.text = palette.colorName
+        
+        let color = palette.color
+        self.colorNameLabel?.textColor = color
+        self.colorView?.backgroundColor = color
+        
+        self.hsbLabel?.text = palette.colorText
+        
+        if changedKeys == nil || changedKeys?.contains(#keyPath(Palette.hue)) == true {
+            
+            self.hueSlider?.value = Float(palette.hue)
+        }
+        if changedKeys == nil || changedKeys?.contains(#keyPath(Palette.saturation)) == true {
+            
+            self.saturationSlider?.value = palette.saturation
+        }
+        if changedKeys == nil || changedKeys?.contains(#keyPath(Palette.brightness)) == true {
+            
+            self.brightnessSlider?.value = palette.brightness
+        }
+    }
+}

CoreStoreDemo/CoreStoreDemo/List and Object Observers Demo/ObserversViewController.swift

@@ -0,0 +1,30 @@
+//
+//  ObserversViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/24.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+
+
+// MARK: - ObserversViewController
+
+class ObserversViewController: UIViewController {
+    
+    // MARK: UIViewController
+    
+    override func viewDidAppear(_ animated: Bool) {
+        
+        super.viewDidAppear(animated)
+        
+        let alert = UIAlertController(
+            title: "Observers Demo",
+            message: "This demo shows how to observe changes to a list of objects. The top and bottom view controllers both observe a single shared \"ListMonitor\" instance.\n\nTap on a row to see how to observe changes made to a single object using a \"ObjectMonitor\".",
+            preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
+        self.present(alert, animated: true, completion: nil)
+    }
+}

CoreStoreDemo/CoreStoreDemo/List and Object Observers Demo/Palette.swift

@@ -0,0 +1,77 @@
+//
+//  Palette.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/05.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import UIKit
+import CoreData
+import CoreStore
+
+
+// MARK: - Palette
+
+class Palette: NSManagedObject {
+
+    @NSManaged var hue: Int32
+    @NSManaged var saturation: Float
+    @NSManaged var brightness: Float
+    
+    @objc dynamic var colorName: String {
+        
+        get {
+            
+            let KVCKey = #keyPath(Palette.colorName)
+            if let colorName = self.getValue(forKvcKey: KVCKey) as? String {
+                
+                return colorName
+            }
+            
+            let colorName: String
+            switch self.hue % 360 {
+                
+            case 0 ..< 20: colorName = "Lower Reds"
+            case 20 ..< 57: colorName = "Oranges and Browns"
+            case 57 ..< 90: colorName = "Yellow-Greens"
+            case 90 ..< 159: colorName = "Greens"
+            case 159 ..< 197: colorName = "Blue-Greens"
+            case 197 ..< 241: colorName = "Blues"
+            case 241 ..< 297: colorName = "Violets"
+            case 297 ..< 331: colorName = "Magentas"
+            default: colorName = "Upper Reds"
+            }
+            
+            self.setPrimitiveValue(colorName, forKey: KVCKey)
+            return colorName
+        }
+        set {
+            
+            self.setValue(newValue.cs_toImportableNativeType(), forKvcKey: #keyPath(Palette.colorName))
+        }
+    }
+    
+    var color: UIColor {
+        
+        return UIColor(
+            hue: CGFloat(self.hue) / 360.0,
+            saturation: CGFloat(self.saturation),
+            brightness: CGFloat(self.brightness),
+            alpha: 1.0
+        )
+    }
+    
+    var colorText: String {
+        
+        return "H: \(self.hue)˚, S: \(round(self.saturation * 100.0))%, B: \(round(self.brightness * 100.0))%"
+    }
+    
+    func setInitialValues() {
+        
+        self.hue = Int32(arc4random_uniform(360))
+        self.saturation = 1.0
+        self.brightness = Float(arc4random_uniform(70) + 30) / 100.0
+    }
+}

CoreStoreDemo/CoreStoreDemo/List and Object Observers Demo/PaletteTableViewCell.swift

@@ -0,0 +1,15 @@
+//
+//  PaletteTableViewCell.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/05.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+
+class PaletteTableViewCell: UITableViewCell {
+    
+    @IBOutlet weak var colorView: UIView?
+    @IBOutlet weak var label: UILabel?
+}

CoreStoreDemo/CoreStoreDemo/Loggers Demo/CustomLoggerViewController.swift

@@ -0,0 +1,123 @@
+//
+//  CustomLoggerViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/05.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+import CoreStore
+
+
+// MARK: - CustomLoggerViewController
+
+class CustomLoggerViewController: UIViewController, CoreStoreLogger {
+    
+    // MARK: NSObject
+    
+    deinit {
+        
+        CoreStore.logger = DefaultLogger()
+    }
+    
+    let dataStack = DataStack()
+    
+    // MARK: UIViewController
+
+    override func viewDidLoad() {
+        
+        super.viewDidLoad()
+        
+        try! self.dataStack.addStorageAndWait(SQLiteStore(fileName: "emptyStore.sqlite"))
+        CoreStore.logger = self
+    }
+    
+    override func viewDidAppear(_ animated: Bool) {
+        
+        super.viewDidAppear(animated)
+        
+        let alert = UIAlertController(
+            title: "Logger Demo",
+            message: "This demo shows how to plug-in any logging framework to CoreStore.\n\nThe view controller implements CoreStoreLogger and appends all logs to the text view.",
+            preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
+        self.present(alert, animated: true, completion: nil)
+    }
+
+    
+    // MARK: CoreStoreLogger
+    
+    func log(level: LogLevel, message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString) {
+        
+        DispatchQueue.main.async { [weak self] in
+            
+            let levelString: String
+            switch level {
+                
+            case .trace: levelString = "Trace"
+            case .notice: levelString = "Notice"
+            case .warning: levelString = "Warning"
+            case .fatal: levelString = "Fatal"
+            }
+            self?.textView?.insertText("\((String(describing: fileName) as NSString).lastPathComponent):\(lineNumber) \(functionName)\n  ↪︎ [Log:\(levelString)] \(message)\n\n")
+        }
+    }
+    
+    func log(error: CoreStoreError, message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString) {
+        
+        DispatchQueue.main.async { [weak self] in
+            
+            self?.textView?.insertText("\((String(describing: fileName) as NSString).lastPathComponent):\(lineNumber) \(functionName)\n  ↪︎ [Error] \(message): \(error)\n\n")
+        }
+    }
+    
+    func assert(_ condition: @autoclosure () -> Bool, message: @autoclosure () -> String, fileName: StaticString, lineNumber: Int, functionName: StaticString) {
+        
+        if condition() {
+            
+            return
+        }
+        
+        let messageString = message()
+        DispatchQueue.main.async { [weak self] in
+            
+            self?.textView?.insertText("\((String(describing: fileName) as NSString).lastPathComponent):\(lineNumber) \(functionName)\n  ↪︎ [Assert] \(messageString)\n\n")
+        }
+    }
+    
+    
+    // MARK: Private
+    
+    @IBOutlet dynamic weak var textView: UITextView?
+    @IBOutlet dynamic weak var segmentedControl: UISegmentedControl?
+    
+    @IBAction dynamic func segmentedControlValueChanged(_ sender: AnyObject?) {
+        
+        switch self.segmentedControl?.selectedSegmentIndex {
+            
+        case 0?:
+            let request = NSFetchRequest<NSFetchRequestResult>()
+            Where(true).applyToFetchRequest(request)
+            Where(false).applyToFetchRequest(request)
+            
+        case 1?:
+            _ = try? dataStack.addStorageAndWait(
+                SQLiteStore(
+                    fileName: "emptyStore.sqlite",
+                    configuration: "invalidStore"
+                )
+            )
+            
+        case 2?:
+            DispatchQueue.global(qos: .background).async {
+                
+                _ = self.dataStack.fetchOne(From<Palette>())
+            }
+            
+        default:
+            return
+        }
+    }
+}

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/MigrationsDemoViewController.swift

@@ -0,0 +1,424 @@
+//
+//  MigrationsDemoViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/21.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+import CoreStore
+
+
+// MARK: - MigrationsDemoViewController
+
+class MigrationsDemoViewController: UIViewController, ListObserver, UITableViewDataSource, UITableViewDelegate {
+    
+    // MARK: UIViewController
+    
+    override func viewDidLoad() {
+        
+        super.viewDidLoad()
+        
+        if let segmentedControl = self.segmentedControl {
+            
+            for (index, model) in self.models.enumerated() {
+                
+                segmentedControl.setTitle(
+                    model.label,
+                    forSegmentAt: index
+                )
+            }
+        }
+        self.set(dataStack: nil, model: nil, scrollToSelection: false)
+    }
+    
+    override func viewDidAppear(_ animated: Bool) {
+        
+        super.viewDidAppear(animated)
+        
+        let alert = UIAlertController(
+            title: "Migrations Demo",
+            message: "This demo shows how to run progressive migrations and how to support multiple model versions in a single project.\n\nThe persistent store contains 10000 organisms, which gain/lose properties when the migration evolves/devolves them.\n\nYou can use the \"mutate\" button to change an organism's properties then migrate to a different model to see how its value gets affected.",
+            preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
+        self.present(alert, animated: true, completion: nil)
+        
+        
+        let modelMetadata = withExtendedLifetime(DataStack(modelName: "MigrationDemo")) {
+            (dataStack: DataStack) -> ModelMetadata in
+            
+            let models = self.models
+            let migrations = try! dataStack.requiredMigrationsForStorage(
+                SQLiteStore(fileName: "MigrationDemo.sqlite")
+            )
+            
+            guard let storeVersion = migrations.first?.sourceVersion else {
+            
+                return models.first!
+            }
+            for model in models {
+                
+                if model.schemaHistory.currentModelVersion == storeVersion {
+                    
+                    return model
+                }
+            }
+            
+            return models.first!
+        }
+        
+        self.selectModelVersion(modelMetadata)
+    }
+    
+    // MARK: ListObserver
+    
+    func listMonitorWillChange(_ monitor: ListMonitor<NSManagedObject>) { }
+    
+    func listMonitorDidChange(_ monitor: ListMonitor<NSManagedObject>) {
+        
+        if self.lastSelectedIndexPath == nil,
+            let numberOfObjectsInSection = self.listMonitor?.numberOfObjectsInSection(0),
+            numberOfObjectsInSection > 0 {
+            
+            self.tableView?.reloadData()
+            self.setSelectedIndexPath(IndexPath(row: 0, section: 0), scrollToSelection: false)
+        }
+        else {
+            
+            self.updateDisplay(reloadData: true, scrollToSelection: true, animated: true)
+        }
+    }
+    
+    // MARK: UITableViewDataSource
+    
+    @objc dynamic func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        
+        return self.listMonitor?.numberOfObjectsInSection(0) ?? 0
+    }
+    
+    @objc dynamic func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        
+        let cell = tableView.dequeueReusableCell(withIdentifier: "OrganismTableViewCell", for: indexPath) as! OrganismTableViewCell
+        
+        let dna = (self.listMonitor?[indexPath] as? OrganismProtocol)?.dna.description ?? ""
+        cell.dnaLabel?.text = "DNA: \(dna)"
+        cell.mutateButtonHandler = { [weak self] _ -> Void in
+            
+            guard let `self` = self,
+                let dataStack = self.dataStack,
+                let organism = self.listMonitor?[indexPath] else {
+                    
+                    return
+            }
+            
+            self.setSelectedIndexPath(indexPath, scrollToSelection: false)
+            self.setEnabled(false)
+            dataStack.perform(
+                asynchronous: { (transaction) in
+                    
+                    let organism = transaction.edit(organism) as! OrganismProtocol
+                    organism.mutate()
+                },
+                completion: { [weak self] _ in
+                    
+                    self?.setEnabled(true)
+                }
+            )
+        }
+        return cell
+    }
+    
+    
+    // MARK: UITableViewDelegate
+    
+    @objc dynamic func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        
+        self.setSelectedIndexPath(indexPath, scrollToSelection: false)
+    }
+    
+    
+    // MARK: Private
+    
+    private typealias ModelMetadata = (label: String, entityType: NSManagedObject.Type, schemaHistory: SchemaHistory)
+    
+    private let models: [ModelMetadata] = [
+        (
+            label: "Model V1",
+            entityType: OrganismV1.self,
+            schemaHistory: SchemaHistory(
+                modelName: "MigrationDemo",
+                migrationChain: ["MigrationDemoV3", "MigrationDemoV2", "MigrationDemo"]
+            )
+        ),
+        (
+            label: "Model V2",
+            entityType: OrganismV2.self,
+            schemaHistory: SchemaHistory(
+                modelName: "MigrationDemo",
+                migrationChain: [
+                    "MigrationDemo": "MigrationDemoV2",
+                    "MigrationDemoV3": "MigrationDemoV2"
+                ]
+            )
+        ),
+        (
+            label: "Model V3",
+            entityType: OrganismV3.self,
+            schemaHistory: SchemaHistory(
+                modelName: "MigrationDemo",
+                migrationChain: ["MigrationDemo", "MigrationDemoV2", "MigrationDemoV3"]
+            )
+        )
+    ]
+    
+    private var _listMonitor: ListMonitor<NSManagedObject>?
+    private var listMonitor: ListMonitor<NSManagedObject>? {
+        
+        return self._listMonitor
+    }
+    
+    private var _dataStack: DataStack?
+    private var dataStack: DataStack? {
+        
+        return self._dataStack
+    }
+    
+    private var _lastSelectedIndexPath: IndexPath?
+    private var lastSelectedIndexPath: IndexPath? {
+        
+        return self._lastSelectedIndexPath
+    }
+    
+    private func setSelectedIndexPath(_ indexPath: IndexPath, scrollToSelection: Bool) {
+        
+        self._lastSelectedIndexPath = indexPath
+        self.updateDisplay(reloadData: false, scrollToSelection: scrollToSelection, animated: true)
+    }
+    
+    @IBOutlet private dynamic weak var headerContainer: UIView?
+    @IBOutlet private dynamic weak var titleLabel: UILabel?
+    @IBOutlet private dynamic weak var organismLabel: UILabel?
+    @IBOutlet private dynamic weak var segmentedControl: UISegmentedControl?
+    @IBOutlet private dynamic weak var progressView: UIProgressView?
+    @IBOutlet private dynamic weak var tableView: UITableView?
+    
+    @IBAction private dynamic func segmentedControlValueChanged(_ sender: AnyObject?) {
+        
+        guard let index = self.segmentedControl?.selectedSegmentIndex else {
+            
+            return
+        }
+        
+        self.selectModelVersion(self.models[index])
+    }
+    
+    private func selectModelVersion(_ model: ModelMetadata) {
+        
+        if self.dataStack?.modelVersion == model.schemaHistory.currentModelVersion {
+            
+            return
+        }
+        
+        self.set(dataStack: nil, model: nil, scrollToSelection: false) // explicitly trigger NSPersistentStore cleanup by deallocating the stack
+        
+        let dataStack = DataStack(schemaHistory: model.schemaHistory)
+        
+        self.setEnabled(false)
+        let progress = dataStack.addStorage(
+            SQLiteStore(
+                fileName: "MigrationDemo.sqlite",
+                migrationMappingProviders: [
+                    CustomSchemaMappingProvider(
+                        from: "MigrationDemoV3",
+                        to: "MigrationDemoV2",
+                        entityMappings: [
+                            .transformEntity(
+                                sourceEntity: "Organism",
+                                destinationEntity: "Organism",
+                                transformer: { (source, createDestination) in
+                                    
+                                    let destination = createDestination()
+                                    destination.enumerateAttributes { (attribute, sourceAttribute) in
+                                        
+                                        if let sourceAttribute = sourceAttribute {
+                                            
+                                            destination[attribute] = source[sourceAttribute]
+                                        }
+                                    }
+                                    destination["numberOfFlippers"] = source["numberOfLimbs"]
+                                }
+                            )
+                        ]
+                    )
+                ]
+            ),
+            completion: { [weak self] (result) -> Void in
+                
+                guard let `self` = self else {
+                    
+                    return
+                }
+                
+                guard case .success = result else {
+                    
+                    self.setEnabled(true)
+                    return
+                }
+                
+                self.set(dataStack: dataStack, model: model, scrollToSelection: true)
+                
+                let count = dataStack.queryValue(
+                    From(model.entityType),
+                    Select<Int>(.count(#keyPath(OrganismV1.dna))))!
+                if count > 0 {
+                    
+                    self.setEnabled(true)
+                }
+                else {
+                    
+                    for i: Int64 in 0 ..< 20 {
+                        
+                        dataStack.perform(
+                            asynchronous: { (transaction) in
+                                
+                                for j: Int64 in 0 ..< 500 {
+                                    
+                                    let organism = transaction.create(Into(model.entityType)) as! OrganismProtocol
+                                    organism.dna = (i * 500) + j + 1
+                                    organism.mutate()
+                                }
+                            },
+                            completion: { _ in }
+                        )
+                    }
+                    dataStack.perform(
+                        asynchronous: { _ in },
+                        completion: { [weak self] _ in
+                    
+                            self?.setEnabled(true)
+                        }
+                    )
+                }
+            }
+        )
+        
+        if let progress = progress {
+            
+            progress.setProgressHandler { [weak self] (progress) -> Void in
+                
+                self?.reloadTableHeaderWithProgress(progress)
+            }
+        }
+    }
+    
+    private func setEnabled(_ enabled: Bool) {
+        
+        UIView.animate(
+            withDuration: 0.2,
+            delay: 0,
+            options: .beginFromCurrentState,
+            animations: { () -> Void in
+                
+                let navigationItem = self.navigationItem
+                navigationItem.leftBarButtonItem?.isEnabled = enabled
+                navigationItem.rightBarButtonItem?.isEnabled = enabled
+                navigationItem.hidesBackButton = !enabled
+                
+                self.segmentedControl?.isEnabled = enabled
+                
+                if let tableView = self.tableView {
+                    
+                    tableView.alpha = enabled ? 1.0 : 0.5
+                    tableView.isUserInteractionEnabled = enabled
+                }
+            },
+            completion: nil
+        )
+    }
+    
+    private func set(dataStack: DataStack?, model: ModelMetadata?, scrollToSelection: Bool) {
+        
+        if let dataStack = dataStack, let model = model {
+            
+            self.segmentedControl?.selectedSegmentIndex = self.models
+                .index(
+                    where: { (_, _, schemaHistory) -> Bool in
+                        
+                        schemaHistory.currentModelVersion == model.schemaHistory.currentModelVersion
+                    }
+                )!
+            
+            self._dataStack = dataStack
+            let listMonitor = dataStack.monitorList(From(model.entityType), OrderBy(.descending("dna")))
+            listMonitor.addObserver(self)
+            self._listMonitor = listMonitor
+            
+            if self.lastSelectedIndexPath == nil  {
+                
+                if listMonitor.numberOfObjectsInSection(0) > 0 {
+                    
+                    self.setSelectedIndexPath(IndexPath(row: 0, section: 0), scrollToSelection: true)
+                }
+            }
+        }
+        else {
+           
+            self.segmentedControl?.selectedSegmentIndex = UISegmentedControlNoSegment
+            self._listMonitor = nil
+            self._dataStack = nil
+        }
+        
+        self.updateDisplay(reloadData: true, scrollToSelection: scrollToSelection, animated: false)
+    }
+    
+    private func reloadTableHeaderWithProgress(_ progress: Progress) {
+        
+        self.progressView?.setProgress(Float(progress.fractionCompleted), animated: true)
+        self.titleLabel?.text = "Migrating: \(progress.localizedDescription ?? "")"
+        self.organismLabel?.text = "Progressive step \(progress.localizedAdditionalDescription ?? "")"
+    }
+    
+    private func updateDisplay(reloadData: Bool, scrollToSelection: Bool, animated: Bool) {
+        
+        var lines = [String]()
+        var organismType = ""
+        if let indexPath = self.lastSelectedIndexPath, let organism = self.listMonitor?[indexPath] {
+            
+            for property in organism.entity.properties {
+                
+                let value = organism.value(forKey: property.name) ?? NSNull()
+                lines.append("\(property.name): \(value)")
+            }
+            organismType = organism.entity.managedObjectClassName
+        }
+        
+        self.titleLabel?.text = organismType
+        self.organismLabel?.text = lines.joined(separator: "\n")
+        self.progressView?.progress = 0
+        
+        self.headerContainer?.setNeedsLayout()
+        
+        guard let tableView = self.tableView else {
+            
+            return
+        }
+        
+        if reloadData {
+            
+            tableView.reloadData()
+        }
+        
+        tableView.layoutIfNeeded()
+        
+        if let indexPath = self.lastSelectedIndexPath,
+            indexPath.row < tableView.numberOfRows(inSection: 0) {
+            
+            tableView.selectRow(at: indexPath,
+                animated: scrollToSelection && animated,
+                scrollPosition: scrollToSelection ? .middle : .none
+            )
+        }
+    }
+}

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/MyAppModel.xcdatamodeld/.xccurrentversion

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict/>
+</plist>

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/MyAppModel.xcdatamodeld/MyAppModel.xcdatamodel/contents

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model userDefinedModelVersionIdentifier="" type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="8166.2" systemVersion="14E46" minimumToolsVersion="Xcode 7.0">
+    <elements/>
+</model>

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/OrganismProtocol.swift

@@ -0,0 +1,16 @@
+//
+//  OrganismProtocol.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/27.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+
+protocol OrganismProtocol: class {
+    
+    var dna: Int64 { get set }
+    
+    func mutate()
+}

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/OrganismTableViewCell.swift

@@ -0,0 +1,22 @@
+//
+//  OrganismTableViewCell.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/07/12.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+
+class OrganismTableViewCell: UITableViewCell {
+
+    @IBOutlet weak dynamic var dnaLabel: UILabel?
+    @IBOutlet weak dynamic var mutateButton: UIButton?
+    
+    var mutateButtonHandler: (() -> Void)?
+
+    @IBAction dynamic func mutateButtonTouchUpInside(_ sender: UIButton?) {
+     
+        self.mutateButtonHandler?()
+    }
+}

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/OrganismV1.swift

@@ -0,0 +1,25 @@
+//
+//  OrganismV1.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/21.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+class OrganismV1: NSManagedObject, OrganismProtocol {
+
+    @NSManaged var dna: Int64
+    @NSManaged var hasHead: Bool
+    @NSManaged var hasTail: Bool
+    
+    // MARK: OrganismProtocol
+    
+    func mutate() {
+        
+        self.hasHead = arc4random_uniform(2) == 1
+        self.hasTail = arc4random_uniform(2) == 1
+    }
+}

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/OrganismV2.swift

@@ -0,0 +1,27 @@
+//
+//  OrganismV2.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/21.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+class OrganismV2: NSManagedObject, OrganismProtocol {
+    
+    @NSManaged var dna: Int64
+    @NSManaged var hasHead: Bool
+    @NSManaged var hasTail: Bool
+    @NSManaged var numberOfFlippers: Int32
+    
+    // MARK: OrganismProtocol
+    
+    func mutate() {
+        
+        self.hasHead = arc4random_uniform(2) == 1
+        self.hasTail = arc4random_uniform(2) == 1
+        self.numberOfFlippers = Int32(arc4random_uniform(9) / 2 * 2)
+    }
+}

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/OrganismV2ToV3MigrationPolicy.swift

@@ -0,0 +1,29 @@
+//
+//  OrganismV2ToV3MigrationPolicy.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/27.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import CoreData
+
+class OrganismV2ToV3MigrationPolicy: NSEntityMigrationPolicy {
+    
+    override func createDestinationInstances(forSource sInstance: NSManagedObject, in mapping: NSEntityMapping, manager: NSMigrationManager) throws {
+        
+        try super.createDestinationInstances(forSource: sInstance, in: mapping, manager: manager)
+        
+        for dInstance in manager.destinationInstances(forEntityMappingName: mapping.name, sourceInstances: [sInstance]) {
+            
+            dInstance.setValue(
+                false,
+                forKey: #keyPath(OrganismV3.hasVertebrae)
+            )
+            dInstance.setValue(
+                sInstance.value(forKey: #keyPath(OrganismV2.numberOfFlippers)),
+                forKey: #keyPath(OrganismV3.numberOfLimbs)
+            )
+        }
+    }
+}

CoreStoreDemo/CoreStoreDemo/MIgrations Demo/OrganismV3.swift

@@ -0,0 +1,29 @@
+//
+//  OrganismV3.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/27.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+class OrganismV3: NSManagedObject, OrganismProtocol {
+    
+    @NSManaged var dna: Int64
+    @NSManaged var hasHead: Bool
+    @NSManaged var hasTail: Bool
+    @NSManaged var numberOfLimbs: Int32
+    @NSManaged var hasVertebrae: Bool
+    
+    // MARK: OrganismProtocol
+    
+    func mutate() {
+        
+        self.hasHead = arc4random_uniform(2) == 1
+        self.hasTail = arc4random_uniform(2) == 1
+        self.numberOfLimbs = Int32(arc4random_uniform(9) / 2 * 2)
+        self.hasVertebrae = arc4random_uniform(2) == 1
+    }
+}

CoreStoreDemo/CoreStoreDemo/MigrationDemo.xcdatamodeld/.xccurrentversion

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>_XCCurrentVersionName</key>
+	<string>MigrationDemoV3.xcdatamodel</string>
+</dict>
+</plist>

CoreStoreDemo/CoreStoreDemo/MigrationDemo.xcdatamodeld/MigrationDemo.xcdatamodel/contents

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="11198.3" systemVersion="15F34" minimumToolsVersion="Xcode 4.3" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
+    <entity name="Organism" representedClassName="CoreStoreDemo.OrganismV1" syncable="YES">
+        <attribute name="dna" optional="YES" attributeType="Integer 64" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="hasHead" optional="YES" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="hasTail" optional="YES" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+    </entity>
+    <elements>
+        <element name="Organism" positionX="-36" positionY="9" width="128" height="90"/>
+    </elements>
+</model>

CoreStoreDemo/CoreStoreDemo/MigrationDemo.xcdatamodeld/MigrationDemoV2.xcdatamodel/contents

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="11198.3" systemVersion="15F34" minimumToolsVersion="Xcode 4.3" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
+    <entity name="Organism" representedClassName="CoreStoreDemo.OrganismV2" syncable="YES">
+        <attribute name="dna" optional="YES" attributeType="Integer 64" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="hasHead" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="hasTail" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="numberOfFlippers" attributeType="Integer 32" defaultValueString="0" usesScalarValueType="NO" syncable="YES"/>
+    </entity>
+    <elements>
+        <element name="Organism" positionX="-36" positionY="9" width="128" height="105"/>
+    </elements>
+</model>

CoreStoreDemo/CoreStoreDemo/MigrationDemo.xcdatamodeld/MigrationDemoV3.xcdatamodel/contents

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="12141" systemVersion="16E195" minimumToolsVersion="Xcode 4.3" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
+    <entity name="Organism" representedClassName="CoreStoreDemo.OrganismV3" syncable="YES">
+        <attribute name="dna" optional="YES" attributeType="Integer 64" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="hasHead" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="hasTail" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="hasVertebrae" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="numberOfLimbs" attributeType="Integer 32" defaultValueString="0" usesScalarValueType="NO" elementID="numberOfFlippers" syncable="YES"/>
+    </entity>
+    <elements>
+        <element name="Organism" positionX="-36" positionY="9" width="128" height="120"/>
+    </elements>
+</model>

CoreStoreDemo/CoreStoreDemo/Stack Setup Demo/FemaleAccount.swift

@@ -0,0 +1,15 @@
+//
+//  FemaleAccount.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/06.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+class FemaleAccount: UserAccount {
+
+
+}

CoreStoreDemo/CoreStoreDemo/Stack Setup Demo/MaleAccount.swift

@@ -0,0 +1,15 @@
+//
+//  MaleAccount.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/06/06.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+class MaleAccount: UserAccount {
+
+
+}

CoreStoreDemo/CoreStoreDemo/Stack Setup Demo/StackSetupDemoViewController.swift

@@ -0,0 +1,196 @@
+//
+//  StackSetupDemoViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/24.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+import CoreStore
+
+
+private struct Static {
+    
+    static let maleConfiguration = "MaleAccounts"
+    static let femaleConfiguration = "FemaleAccounts"
+    
+    static let facebookStack: DataStack = {
+        
+        let dataStack = DataStack(modelName: "StackSetupDemo")
+        try! dataStack.addStorageAndWait(
+            SQLiteStore(
+                fileName: "AccountsDemo_FB_Male.sqlite",
+                configuration: maleConfiguration,
+                localStorageOptions: .recreateStoreOnModelMismatch
+            )
+        )
+        try! dataStack.addStorageAndWait(
+            SQLiteStore(
+                fileName: "AccountsDemo_FB_Female.sqlite",
+                configuration: femaleConfiguration,
+                localStorageOptions: .recreateStoreOnModelMismatch
+            )
+        )
+        
+        _ = try? dataStack.perform(
+            synchronous: { (transaction) in
+                
+                transaction.deleteAll(From<UserAccount>())
+                
+                let account1 = transaction.create(Into<MaleAccount>(maleConfiguration))
+                account1.accountType = "Facebook"
+                account1.name = "John Smith HCD"
+                account1.friends = 42
+                
+                let account2 = transaction.create(Into<FemaleAccount>(femaleConfiguration))
+                account2.accountType = "Facebook"
+                account2.name = "Jane Doe HCD"
+                account2.friends = 314
+            }
+        )
+        
+        return dataStack
+    }()
+    
+    static let twitterStack: DataStack = {
+        
+        let dataStack = DataStack(modelName: "StackSetupDemo")
+        try! dataStack.addStorageAndWait(
+            SQLiteStore(
+                fileName: "AccountsDemo_TW_Male.sqlite",
+                configuration: maleConfiguration,
+                localStorageOptions: .recreateStoreOnModelMismatch
+            )
+        )
+        try! dataStack.addStorageAndWait(
+            SQLiteStore(
+                fileName: "AccountsDemo_TW_Female.sqlite",
+                configuration: femaleConfiguration,
+                localStorageOptions: .recreateStoreOnModelMismatch
+            )
+        )
+        
+        _ = try? dataStack.perform(
+            synchronous: { (transaction) in
+                
+                transaction.deleteAll(From<UserAccount>())
+                
+                let account1 = transaction.create(Into<MaleAccount>(maleConfiguration))
+                account1.accountType = "Twitter"
+                account1.name = "#johnsmith_hcd"
+                account1.friends = 7
+                
+                let account2 = transaction.create(Into<FemaleAccount>(femaleConfiguration))
+                account2.accountType = "Twitter"
+                account2.name = "#janedoe_hcd"
+                account2.friends = 100
+            }
+        )
+        return dataStack
+    }()
+}
+
+
+
+
+// MARK: - StackSetupDemoViewController
+
+class StackSetupDemoViewController: UITableViewController {
+    
+    let accounts = [
+        Static.facebookStack.fetchAll(From(UserAccount.self)) ?? [],
+        Static.twitterStack.fetchAll(From(UserAccount.self)) ?? []
+    ]
+    
+    
+    // MARK: UIViewController
+    
+    override func viewWillAppear(_ animated: Bool) {
+        
+        super.viewWillAppear(animated)
+        
+        self.tableView.reloadData()
+        
+        let indexPath = IndexPath(row: 0, section: 0)
+        self.tableView.selectRow(at: indexPath, animated: false, scrollPosition: .none)
+        self.updateDetails(account: self.accounts[indexPath.section][indexPath.row])
+    }
+    
+    override func viewDidAppear(_ animated: Bool) {
+        
+        super.viewDidAppear(animated)
+        
+        let alert = UIAlertController(
+            title: "Setup Demo",
+            message: "This demo shows how to initialize 2 DataStacks with 2 configurations each, for a total of 4 SQLite files, each with 1 instance of a \"UserAccount\" entity.",
+            preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
+        self.present(alert, animated: true, completion: nil)
+    }
+    
+    
+    // MARK: UITableViewDataSource
+    
+    override func numberOfSections(in tableView: UITableView) -> Int {
+        
+        return self.accounts.count
+    }
+    
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        
+        return self.accounts[section].count
+    }
+    
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        
+        let cell = tableView.dequeueReusableCell(withIdentifier: "UITableViewCell")!
+        
+        let account = self.accounts[indexPath.section][indexPath.row]
+        cell.textLabel?.text = account.name
+        cell.detailTextLabel?.text = "\(account.friends) friends"
+        
+        return cell
+    }
+    
+    
+    // MARK: UITableViewDelegate
+    
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        
+        let account = self.accounts[indexPath.section][indexPath.row]
+        self.updateDetails(account: account)
+    }
+    
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+        
+        switch section {
+            
+        case 0:
+            let count = self.accounts[section].count
+            return "Facebook Accounts (\(count) users)"
+            
+        case 1:
+            let count = self.accounts[section].count
+            return "Twitter Accounts (\(count) users)"
+            
+        default:
+            return nil
+        }
+    }
+    
+    
+    // MARK: Private
+    
+    @IBOutlet private dynamic weak var accountTypeLabel: UILabel?
+    @IBOutlet private dynamic weak var nameLabel: UILabel?
+    @IBOutlet private dynamic weak var friendsLabel: UILabel?
+    
+    private func updateDetails(account: UserAccount) {
+        
+        self.accountTypeLabel?.text = account.accountType
+        self.nameLabel?.text = account.name
+        self.friendsLabel?.text = "\(account.friends) friends"
+    }
+}

CoreStoreDemo/CoreStoreDemo/Stack Setup Demo/UserAccount.swift

@@ -0,0 +1,20 @@
+//
+//  UserAccount.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/24.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+
+// MARK: - UserAccount
+
+class UserAccount: NSManagedObject {
+    
+    @NSManaged var accountType: String?
+    @NSManaged var name: String?
+    @NSManaged var friends: Int32
+}

CoreStoreDemo/CoreStoreDemo/StackSetupDemo.xcdatamodeld/StackSetupDemo.xcdatamodel/contents

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model userDefinedModelVersionIdentifier="" type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="7701" systemVersion="14D136" minimumToolsVersion="Xcode 4.3" macOSVersion="Automatic" iOSVersion="Automatic">
+    <entity name="FemaleAccount" representedClassName="CoreStoreDemo.FemaleAccount" parentEntity="UserAccount" syncable="YES"/>
+    <entity name="MaleAccount" representedClassName="CoreStoreDemo.MaleAccount" parentEntity="UserAccount" syncable="YES"/>
+    <entity name="UserAccount" representedClassName="CoreStoreDemo.UserAccount" isAbstract="YES" syncable="YES">
+        <attribute name="accountType" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="friends" optional="YES" attributeType="Integer 32" defaultValueString="0" syncable="YES"/>
+        <attribute name="name" optional="YES" attributeType="String" syncable="YES"/>
+    </entity>
+    <configuration name="FemaleAccounts">
+        <memberEntity name="FemaleAccount"/>
+        <memberEntity name="UserAccount"/>
+    </configuration>
+    <configuration name="MaleAccounts">
+        <memberEntity name="MaleAccount"/>
+        <memberEntity name="UserAccount"/>
+    </configuration>
+    <elements>
+        <element name="UserAccount" positionX="-63" positionY="-18" width="128" height="90"/>
+        <element name="MaleAccount" positionX="-54" positionY="18" width="128" height="45"/>
+        <element name="FemaleAccount" positionX="-36" positionY="27" width="128" height="45"/>
+    </elements>
+</model>

CoreStoreDemo/CoreStoreDemo/Transactions Demo/Place.swift

@@ -0,0 +1,50 @@
+//
+//  Place.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/24.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+import CoreData
+import MapKit
+
+
+// MARK: - Place
+
+class Place: NSManagedObject, MKAnnotation {
+
+    @NSManaged var latitude: Double
+    @NSManaged var longitude: Double
+    @NSManaged var title: String?
+    @NSManaged var subtitle: String?
+    
+    func setInitialValues() {
+        
+        self.latitude = Double(arc4random_uniform(180)) - 90
+        self.longitude = Double(arc4random_uniform(360)) - 180
+        self.title = "\(self.latitude), \(self.longitude)"
+        self.subtitle = nil
+    }
+    
+    // MARK: MKAnnotation
+    
+    var coordinate: CLLocationCoordinate2D {
+    
+        get {
+            
+            return CLLocationCoordinate2DMake(
+                self.latitude,
+                self.longitude
+            )
+        }
+        set {
+            
+            self.latitude = newValue.latitude
+            self.longitude = newValue.longitude
+            self.title = "\(self.latitude), \(self.longitude)"
+            self.subtitle = nil
+        }
+    }
+}

CoreStoreDemo/CoreStoreDemo/Transactions Demo/TransactionsDemoViewController.swift

@@ -0,0 +1,218 @@
+//
+//  TransactionsDemoViewController.swift
+//  CoreStoreDemo
+//
+//  Created by John Rommel Estropia on 2015/05/24.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+import CoreLocation
+import MapKit
+import AddressBookUI
+import CoreStore
+
+
+private struct Static {
+    
+    static let placeController: ObjectMonitor<Place> = {
+        
+        try! CoreStore.addStorageAndWait(
+            SQLiteStore(
+                fileName: "PlaceDemo.sqlite",
+                configuration: "TransactionsDemo",
+                localStorageOptions: .recreateStoreOnModelMismatch
+            )
+        )
+        
+        var place = CoreStore.fetchOne(From<Place>())
+        if place == nil {
+            
+            _ = try? CoreStore.perform(
+                synchronous: { (transaction) in
+                    
+                    let place = transaction.create(Into<Place>())
+                    place.setInitialValues()
+                }
+            )
+            place = CoreStore.fetchOne(From<Place>())
+        }
+        
+        return CoreStore.monitorObject(place!)
+    }()
+}
+
+
+// MARK: - TransactionsDemoViewController
+
+class TransactionsDemoViewController: UIViewController, MKMapViewDelegate, ObjectObserver {
+    
+    // MARK: NSObject
+    
+    deinit {
+        
+        Static.placeController.removeObserver(self)
+    }
+    
+    
+    // MARK: UIViewController
+    
+    override func viewDidLoad() {
+        
+        super.viewDidLoad()
+        
+        let longPressGesture = UILongPressGestureRecognizer(
+            target: self,
+            action: #selector(self.longPressGestureRecognized(_:))
+        )
+        self.mapView?.addGestureRecognizer(longPressGesture)
+        
+        Static.placeController.addObserver(self)
+        
+        self.navigationItem.rightBarButtonItem = UIBarButtonItem(
+            barButtonSystemItem: .refresh,
+            target: self,
+            action: #selector(self.refreshButtonTapped(_:))
+        )
+    }
+    
+    override func viewDidAppear(_ animated: Bool) {
+        
+        super.viewDidAppear(animated)
+        
+        let alert = UIAlertController(
+            title: "Transactions Demo",
+            message: "This demo shows how to use the 3 types of transactions to save updates: synchronous, asynchronous, and unsafe.\n\nTap and hold on the map to change the pin location.",
+            preferredStyle: .alert
+        )
+        alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
+        self.present(alert, animated: true, completion: nil)
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        
+        super.viewWillAppear(animated)
+        
+        if let mapView = self.mapView, let place = Static.placeController.object {
+            
+            mapView.addAnnotation(place)
+            mapView.setCenter(place.coordinate, animated: false)
+            mapView.selectAnnotation(place, animated: false)
+        }
+    }
+    
+    
+    // MARK: MKMapViewDelegate
+    
+    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
+        
+        let identifier = "MKAnnotationView"
+        var annotationView: MKPinAnnotationView! = mapView.dequeueReusableAnnotationView(withIdentifier: identifier) as? MKPinAnnotationView
+        if annotationView == nil {
+            
+            annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
+            annotationView.isEnabled = true
+            annotationView.canShowCallout = true
+            annotationView.animatesDrop = true
+        }
+        else {
+            
+            annotationView.annotation = annotation
+        }
+        
+        return annotationView
+    }
+    
+    
+    // MARK: ObjectObserver
+    
+    func objectMonitor(_ monitor: ObjectMonitor<Place>, willUpdateObject object: Place) {
+        
+        // none
+    }
+    
+    func objectMonitor(_ monitor: ObjectMonitor<Place>, didUpdateObject object: Place, changedPersistentKeys: Set<KeyPath>) {
+        
+        if let mapView = self.mapView {
+            
+            mapView.removeAnnotations(mapView.annotations)
+            mapView.addAnnotation(object)
+            mapView.setCenter(object.coordinate, animated: true)
+            mapView.selectAnnotation(object, animated: true)
+            
+            if changedPersistentKeys.contains(#keyPath(Place.latitude)) || changedPersistentKeys.contains(#keyPath(Place.longitude)) {
+                
+                self.geocode(place: object)
+            }
+        }
+    }
+    
+    func objectMonitor(_ monitor: ObjectMonitor<Place>, didDeleteObject object: Place) {
+        
+        // none
+    }
+
+    
+    // MARK: Private
+    
+    var geocoder: CLGeocoder?
+    
+    @IBOutlet weak var mapView: MKMapView?
+    
+    @IBAction dynamic func longPressGestureRecognized(_ sender: AnyObject?) {
+        
+        if let mapView = self.mapView,
+            let gesture = sender as? UILongPressGestureRecognizer,
+            gesture.state == .began {
+            
+            let coordinate = mapView.convert(
+                gesture.location(in: mapView),
+                toCoordinateFrom: mapView
+            )
+            CoreStore.perform(
+                asynchronous: { (transaction) in
+                    
+                    let place = transaction.edit(Static.placeController.object)
+                    place?.coordinate = coordinate
+                },
+                completion: { _ in }
+            )
+        }
+    }
+    
+    @IBAction dynamic func refreshButtonTapped(_ sender: AnyObject?) {
+        
+        _ = try? CoreStore.perform(
+            synchronous: { (transaction) in
+                
+                let place = transaction.edit(Static.placeController.object)
+                place?.setInitialValues()
+            }
+        )
+    }
+    
+    func geocode(place: Place) {
+        
+        let transaction = CoreStore.beginUnsafe()
+        
+        self.geocoder?.cancelGeocode()
+        
+        let geocoder = CLGeocoder()
+        self.geocoder = geocoder
+        geocoder.reverseGeocodeLocation(
+            CLLocation(latitude: place.latitude, longitude: place.longitude),
+            completionHandler: { [weak self] (placemarks, error) -> Void in
+                
+                if let placemark = placemarks?.first, let addressDictionary = placemark.addressDictionary {
+                    
+                    let place = transaction.edit(Static.placeController.object)
+                    place?.title = placemark.name
+                    place?.subtitle = ABCreateStringWithAddressDictionary(addressDictionary, true)
+                    transaction.commit { (_) -> Void in }
+                }
+                
+                self?.geocoder = nil
+            }
+        )
+    }
+}

CoreStoreTests/BaseTests/BaseTestCase.swift

@@ -0,0 +1,204 @@
+//
+//  BaseTestCase.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+// MARK: - BaseTestCase
+
+class BaseTestCase: XCTestCase {
+    
+    // MARK: Internal
+    
+    @nonobjc
+    @discardableResult
+    func prepareStack<T>(configurations: [ModelConfiguration] = [nil], _ closure: (_ dataStack: DataStack) -> T) -> T {
+        
+        let stack = DataStack(
+            xcodeModelName: "Model",
+            bundle: Bundle(for: type(of: self))
+        )
+        do {
+            
+            try configurations.forEach {
+                
+                try stack.addStorageAndWait(
+                    SQLiteStore(
+                        fileURL: SQLiteStore.defaultRootDirectory
+                            .appendingPathComponent(UUID().uuidString)
+                            .appendingPathComponent("\(type(of: self))_\(($0 ?? "-null-")).sqlite"),
+                        configuration: $0,
+                        localStorageOptions: .recreateStoreOnModelMismatch
+                    )
+                )
+            }
+        }
+        catch let error as NSError {
+            
+            XCTFail(error.coreStoreDumpString)
+        }
+        return closure(stack)
+    }
+    
+    @nonobjc
+    func expectLogger<T>(_ expectations: [TestLogger.Expectation], closure: () -> T) -> T {
+        
+        CoreStore.logger = TestLogger(self.prepareLoggerExpectations(expectations))
+        defer {
+            
+            self.checkExpectationsImmediately()
+            CoreStore.logger = TestLogger([:])
+        }
+        return closure()
+    }
+    
+    @nonobjc
+    func expectLogger(_ expectations: [TestLogger.Expectation: XCTestExpectation]) {
+        
+        CoreStore.logger = TestLogger(expectations)
+    }
+    
+    @nonobjc
+    func prepareLoggerExpectations(_ expectations: [TestLogger.Expectation]) -> [TestLogger.Expectation: XCTestExpectation] {
+        
+        var testExpectations: [TestLogger.Expectation: XCTestExpectation] = [:]
+        for expectation in expectations {
+            
+            testExpectations[expectation] = self.expectation(description: "Logger Expectation: \(expectation)")
+        }
+        return testExpectations
+    }
+    
+    @nonobjc
+    func checkExpectationsImmediately() {
+        
+        self.waitForExpectations(timeout: 0, handler: { _ in })
+    }
+    
+    @nonobjc
+    func waitAndCheckExpectations() {
+        
+        self.waitForExpectations(timeout: 10, handler: {_ in })
+    }
+    
+    // MARK: XCTestCase
+    
+    override func setUp() {
+        
+        super.setUp()
+        self.deleteStores()
+        CoreStore.logger = TestLogger([:])
+    }
+    
+    override func tearDown() {
+        
+        CoreStore.logger = DefaultLogger()
+        self.deleteStores()
+        super.tearDown()
+    }
+    
+    
+    // MARK: Private
+    
+    private func deleteStores() {
+        
+        _ = try? FileManager.default.removeItem(at: SQLiteStore.defaultRootDirectory)
+    }
+}
+
+
+// MARK: - TestLogger
+
+class TestLogger: CoreStoreLogger {
+    
+    enum Expectation {
+        
+        case logWarning
+        case logFatal
+        case logError
+        case assertionFailure
+        case fatalError
+    }
+    
+    init(_ expectations: [Expectation: XCTestExpectation]) {
+        
+        self.expectations = expectations
+    }
+    
+    
+    // MARK: CoreStoreLogger
+    
+    var enableObjectConcurrencyDebugging: Bool = true
+    
+    func log(level: LogLevel, message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString) {
+        
+        switch level {
+            
+        case .warning:  self.fulfill(.logWarning)
+        case .fatal:    self.fulfill(.logFatal)
+        default:        break
+        }
+    }
+    
+    func log(error: CoreStoreError, message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString) {
+        
+        self.fulfill(.logError)
+    }
+    
+    func assert(_ condition: @autoclosure () -> Bool, message: @autoclosure () -> String, fileName: StaticString, lineNumber: Int, functionName: StaticString) {
+        
+        if condition() {
+            
+            return
+        }
+        self.fulfill(.assertionFailure)
+    }
+    
+    func abort(_ message: String, fileName: StaticString, lineNumber: Int, functionName: StaticString) {
+        
+        self.fulfill(.fatalError)
+    }
+    
+    
+    // MARK: Private
+    
+    private var expectations: [Expectation: XCTestExpectation]
+    
+    private func fulfill(_ expectation: Expectation) {
+        
+        if let instance = self.expectations[expectation] {
+            
+            instance.fulfill()
+            self.expectations[expectation] = nil
+        }
+        else {
+            
+            XCTFail("Unexpected Logger Action: \(expectation)")
+        }
+    }
+}

CoreStoreTests/BaseTests/BaseTestDataTestCase.swift

@@ -0,0 +1,77 @@
+//
+//  BaseTestDataTestCase.swift
+//  CoreStore
+//
+//  Created by John Rommel Estropia on 2016/06/11.
+//  Copyright © 2016 John Rommel Estropia. All rights reserved.
+//
+
+import Foundation
+
+@testable
+import CoreStore
+
+
+// MARK: - BaseTestDataTestCase
+
+class BaseTestDataTestCase: BaseTestCase {
+    
+    @nonobjc
+    let dateFormatter: DateFormatter = cs_lazy {
+        
+        let formatter = DateFormatter()
+        formatter.locale = Locale(identifier: "en_US_POSIX")
+        formatter.timeZone = TimeZone(identifier: "UTC")
+        formatter.calendar = Calendar(identifier: Calendar.Identifier.gregorian)
+        formatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ssZ"
+        return formatter
+    }
+    
+    @nonobjc
+    func prepareTestDataForStack(_ stack: DataStack, configurations: [ModelConfiguration] = [nil]) {
+        
+        try! stack.perform(
+            synchronous: { (transaction) in
+                
+                for (configurationIndex, configuration) in configurations.enumerated() {
+                    
+                    let configurationOrdinal = configurationIndex + 1
+                    if configuration == nil || configuration == "Config1" {
+                        
+                        for idIndex in 1 ... 5 {
+                            
+                            let object = transaction.create(Into<TestEntity1>(configuration))
+                            object.testEntityID = NSNumber(value: (configurationOrdinal * 100) + idIndex)
+                            
+                            object.testNumber = NSNumber(value: idIndex)
+                            object.testDate = self.dateFormatter.date(from: "2000-\(configurationOrdinal)-\(idIndex)T00:00:00Z")
+                            object.testBoolean = NSNumber(value: (idIndex % 2) == 1)
+                            object.testDecimal = NSDecimalNumber(string: "\(idIndex)")
+                            
+                            let string = "\(configuration ?? "nil"):TestEntity1:\(idIndex)"
+                            object.testString = string
+                            object.testData = (string as NSString).data(using: String.Encoding.utf8.rawValue)
+                        }
+                    }
+                    if configuration == nil || configuration == "Config2" {
+                        
+                        for idIndex in 1 ... 5 {
+                            
+                            let object = transaction.create(Into<TestEntity2>(configuration))
+                            object.testEntityID = NSNumber(value: (configurationOrdinal * 200) + idIndex)
+                            
+                            object.testNumber = NSNumber(value: idIndex)
+                            object.testDate = self.dateFormatter.date(from: "2000-\(configurationOrdinal)-\(idIndex)T00:00:00Z")
+                            object.testBoolean = NSNumber(value: (idIndex % 2) == 1)
+                            object.testDecimal = NSDecimalNumber(string: "\(idIndex)")
+                            
+                            let string = "\(configuration ?? "nil"):TestEntity2:\(idIndex)"
+                            object.testString = string
+                            object.testData = (string as NSString).data(using: String.Encoding.utf8.rawValue)
+                        }
+                    }
+                }
+            }
+        )
+    }
+}

CoreStoreTests/BridgingTests.h

@@ -0,0 +1,30 @@
+//
+//  BridgingTests.h
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+#import <XCTest/XCTest.h>
+
+@interface BridgingTests : XCTestCase
+
+@end

CoreStoreTests/BridgingTests.m

@@ -0,0 +1,257 @@
+//
+//  BridgingTests.m
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+#import "BridgingTests.h"
+#import <CoreStore/CoreStore.h>
+#import <CoreStore/CoreStore-Swift.h>
+#import "CoreStoreTests-Swift.h"
+
+@import CoreData;
+
+// MARK: - BridgingTests
+
+@implementation BridgingTests
+
+- (void)test_ThatFlags_HaveCorrectValues {
+    
+    XCTAssertEqual(CSLocalStorageOptionsNone, 0);
+    XCTAssertEqual(CSLocalStorageOptionsRecreateStoreOnModelMismatch, 1);
+    XCTAssertEqual(CSLocalStorageOptionsPreventProgressiveMigration, 2);
+    XCTAssertEqual(CSLocalStorageOptionsAllowSynchronousLightweightMigration, 4);
+}
+
+- (void)test_ThatKeyPaths_AreCorrect {
+    
+    XCTAssertEqualObjects(CSKeyPath(TestEntity1, testNumber), @"testNumber");
+    XCTAssertEqualObjects(CSKeyPath(TestEntity1, testString), @"testString");
+    XCTAssertEqualObjects(CSKeyPathOperator(count, TestEntity1, testString), @"@count.testString");
+    XCTAssertEqualObjects(CSKeyPathOperator(max, TestEntity1, testNumber), @"@max.testNumber");
+}
+
+- (void)test_ThatFromClauses_BridgeCorrectly {
+    
+    {
+        CSFrom *from = CSFromClass([TestEntity1 class]);
+        XCTAssertEqualObjects(from.entityClass, [TestEntity1 class]);
+        XCTAssertNil(from.configurations);
+    }
+    {
+        CSFrom *from = CSFromClass([TestEntity1 class], [NSNull null]);
+        XCTAssertEqualObjects(from.entityClass, [TestEntity1 class]);
+        
+        NSArray *configurations = @[[NSNull null]];
+        XCTAssertEqualObjects(from.configurations, configurations);
+    }
+    {
+        CSFrom *from = CSFromClass([TestEntity1 class], @"Config1");
+        XCTAssertEqualObjects(from.entityClass, [TestEntity1 class]);
+        
+        NSArray *configurations = @[@"Config1"];
+        XCTAssertEqualObjects(from.configurations, configurations);
+    }
+    {
+        CSFrom *from = CSFromClass([TestEntity1 class], @[[NSNull null], @"Config2"]);
+        XCTAssertEqualObjects(from.entityClass, [TestEntity1 class]);
+        
+        NSArray *configurations = @[[NSNull null], @"Config2"];
+        XCTAssertEqualObjects(from.configurations, configurations);
+    }
+}
+
+- (void)test_ThatWhereClauses_BridgeCorrectly {
+    
+    {
+        CSWhere *where = CSWhereFormat(@"%K == %@", @"key", @"value");
+        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"%K == %@", @"key", @"value"];
+        XCTAssertEqualObjects(where.predicate, predicate);
+    }
+    {
+        CSWhere *where = CSWhereValue(YES);
+        NSPredicate *predicate = [NSPredicate predicateWithValue:YES];
+        XCTAssertEqualObjects(where.predicate, predicate);
+    }
+    {
+        CSWhere *where = CSWherePredicate([NSPredicate predicateWithFormat:@"%K == %@", @"key", @"value"]);
+        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"%K == %@", @"key", @"value"];
+        XCTAssertEqualObjects(where.predicate, predicate);
+    }
+}
+
+- (void)test_ThatOrderByClauses_BridgeCorrectly {
+    
+    {
+        CSOrderBy *orderBy = CSOrderByKey(CSSortAscending(@"key"));
+        XCTAssertEqualObjects(orderBy.sortDescriptors, @[[NSSortDescriptor sortDescriptorWithKey:@"key" ascending:YES]]);
+    }
+    {
+        CSOrderBy *orderBy = CSOrderByKey(CSSortDescending(@"key"));
+        XCTAssertEqualObjects(orderBy.sortDescriptors, @[[NSSortDescriptor sortDescriptorWithKey:@"key" ascending:NO]]);
+    }
+    {
+        CSOrderBy *orderBy = CSOrderByKeys(CSSortAscending(@"key1"), CSSortDescending(@"key2"), nil);
+        NSArray *sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"key1" ascending:YES],
+                                     [NSSortDescriptor sortDescriptorWithKey:@"key2" ascending:NO]];
+        XCTAssertEqualObjects(orderBy.sortDescriptors, sortDescriptors);
+    }
+}
+
+- (void)test_ThatGroupByClauses_BridgeCorrectly {
+    
+    {
+        CSGroupBy *groupBy = CSGroupByKeyPath(@"key");
+        XCTAssertEqualObjects(groupBy.keyPaths, @[@"key"]);
+    }
+    {
+        CSGroupBy *groupBy = CSGroupByKeyPaths(@[@"key1", @"key2"]);
+        
+        NSArray *keyPaths = @[@"key1", @"key2"];
+        XCTAssertEqualObjects(groupBy.keyPaths, keyPaths);
+    }
+}
+
+- (void)test_ThatTweakClauses_BridgeCorrectly {
+    
+    CSTweak *tweak = CSTweakRequest(^(NSFetchRequest * _Nonnull fetchRequest) {
+        
+        fetchRequest.fetchLimit = 100;
+    });
+    NSFetchRequest *request = [NSFetchRequest new];
+    tweak.block(request);
+    XCTAssertEqual(request.fetchLimit, 100);
+}
+
+- (void)test_ThatIntoClauses_BridgeCorrectly {
+    
+    {
+        CSInto *into = CSIntoClass([TestEntity1 class]);
+        XCTAssertEqualObjects(into.entityClass, [TestEntity1 class]);
+    }
+    {
+        CSInto *into = CSIntoClass([TestEntity1 class], [NSNull null]);
+        XCTAssertEqualObjects(into.entityClass, [TestEntity1 class]);
+        XCTAssertNil(into.configuration);
+    }
+    {
+        CSInto *into = CSIntoClass([TestEntity1 class], @"Config1");
+        XCTAssertEqualObjects(into.entityClass, [TestEntity1 class]);
+        XCTAssertEqualObjects(into.configuration, @"Config1");
+    }
+}
+
+- (void)test_ThatDataStacks_BridgeCorrectly {
+    
+    CSDataStack *dataStack = [[CSDataStack alloc]
+                              initWithXcodeModelName:@"Model"
+                              bundle:[NSBundle bundleForClass:[self class]]
+                              versionChain:nil];
+    XCTAssertNotNil(dataStack);
+    
+    [CSCoreStore setDefaultStack:dataStack];
+    XCTAssertTrue([dataStack isEqual:[CSCoreStore defaultStack]]);
+}
+
+- (void)test_ThatStorages_BridgeCorrectly {
+    
+    NSError *memoryError;
+    CSInMemoryStore *memoryStorage = [CSCoreStore
+                                      addInMemoryStorageAndWait:[CSInMemoryStore new]
+                                      error:&memoryError];
+    XCTAssertNotNil(memoryStorage);
+    XCTAssertEqualObjects([[memoryStorage class] storeType], [CSInMemoryStore storeType]);
+    XCTAssertEqualObjects([[memoryStorage class] storeType], NSInMemoryStoreType);
+    XCTAssertNil(memoryStorage.configuration);
+    XCTAssertNil(memoryStorage.storeOptions);
+    XCTAssertNil(memoryError);
+    
+    NSError *sqliteError;
+    CSSQLiteStore *sqliteStorage = [CSCoreStore
+                                    addSQLiteStorageAndWait:[CSSQLiteStore new]
+                                    error:&sqliteError];
+    XCTAssertNotNil(sqliteStorage);
+    XCTAssertEqualObjects([[sqliteStorage class] storeType], [CSSQLiteStore storeType]);
+    XCTAssertEqualObjects([[sqliteStorage class] storeType], NSSQLiteStoreType);
+    XCTAssertNil(sqliteStorage.configuration);
+    XCTAssertEqualObjects(sqliteStorage.storeOptions, @{ NSSQLitePragmasOption: @{ @"journal_mode": @"WAL" } });
+    XCTAssertNil(sqliteError);
+}
+
+- (void)test_ThatTransactions_BridgeCorrectly {
+    
+    [CSCoreStore
+     setDefaultStack:[[CSDataStack alloc]
+                      initWithXcodeModelName:@"Model"
+                      bundle:[NSBundle bundleForClass:[self class]]
+                      versionChain:nil]];
+    [CSCoreStore
+     addInMemoryStorageAndWait:[CSInMemoryStore new]
+     error:nil];
+    
+    {
+        CSUnsafeDataTransaction *transaction = [CSCoreStore beginUnsafe];
+        XCTAssertNotNil(transaction);
+        XCTAssert([transaction isKindOfClass:[CSUnsafeDataTransaction class]]);
+        NSError *error;
+        BOOL result = [transaction commitAndWaitWithError:&error];
+        XCTAssertTrue(result);
+        XCTAssertNil(error);
+    }
+    {
+        XCTestExpectation *expectation = [self expectationWithDescription:@"sync"];
+        NSError *error;
+        BOOL result = [CSCoreStore
+         beginSynchronous:^(CSSynchronousDataTransaction * _Nonnull transaction) {
+             
+             XCTAssertNotNil(transaction);
+             XCTAssert([transaction isKindOfClass:[CSSynchronousDataTransaction class]]);
+             NSError *error;
+             XCTAssertTrue([transaction commitAndWaitWithError:&error]);
+             XCTAssertNil(error);
+             [expectation fulfill];
+         }
+                       error:&error];
+        XCTAssertTrue(result);
+        XCTAssertNil(error);
+    }
+    {
+        XCTestExpectation *expectation = [self expectationWithDescription:@"async"];
+        [CSCoreStore beginAsynchronous:^(CSAsynchronousDataTransaction * _Nonnull transaction) {
+            
+            XCTAssertNotNil(transaction);
+            XCTAssert([transaction isKindOfClass:[CSAsynchronousDataTransaction class]]);
+            [transaction
+             commitWithSuccess:^{
+                 
+                 [expectation fulfill];
+             }
+             failure:^(CSError *error){
+                 
+                 XCTFail();
+             }];
+        }];
+    }
+    [self waitForExpectationsWithTimeout:10 handler:nil];
+}
+
+@end

CoreStoreTests/ConvenienceTests.swift

@@ -0,0 +1,91 @@
+//
+//  ConvenienceTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+@testable
+import CoreStore
+
+
+// MARK: - ConvenienceTests
+
+@available(OSX 10.12, *)
+class ConvenienceTests: BaseTestCase {
+    
+    @objc
+    dynamic func test_ThatDataStacks_CanCreateFetchedResultsControllers() {
+
+        self.prepareStack { (stack) in
+            
+            let controller = stack.createFetchedResultsController(
+                From<TestEntity1>(),
+                SectionBy(#keyPath(TestEntity1.testString)),
+                Where("%@ > %d", #keyPath(TestEntity1.testEntityID), 100),
+                OrderBy(.ascending(#keyPath(TestEntity1.testString))),
+                Tweak { $0.fetchLimit = 10 }
+            )
+            XCTAssertEqual(controller.managedObjectContext, stack.mainContext)
+            XCTAssertEqual(controller.fetchRequest.entity?.managedObjectClassName, NSStringFromClass(TestEntity1.self))
+            XCTAssertEqual(controller.sectionNameKeyPath, #keyPath(TestEntity1.testString))
+            XCTAssertEqual(
+                controller.fetchRequest.sortDescriptors!,
+                OrderBy(.ascending(#keyPath(TestEntity1.testString))).sortDescriptors
+            )
+            XCTAssertEqual(
+                controller.fetchRequest.predicate,
+                Where("%@ > %d", #keyPath(TestEntity1.testEntityID), 100).predicate
+            )
+            XCTAssertEqual(controller.fetchRequest.fetchLimit, 10)
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatUnsafeDataTransactions_CanCreateFetchedResultsControllers() {
+        
+        self.prepareStack { (stack) in
+            
+            _ = withExtendedLifetime(stack.beginUnsafe()) { (transaction: UnsafeDataTransaction) in
+                
+                let controller = transaction.createFetchedResultsController(
+                    From<TestEntity1>(),
+                    SectionBy(#keyPath(TestEntity1.testString)),
+                    Where("%@ > %d", #keyPath(TestEntity1.testEntityID), 100),
+                    OrderBy(.ascending(#keyPath(TestEntity1.testString))),
+                    Tweak { $0.fetchLimit = 10 }
+                )
+                XCTAssertEqual(controller.managedObjectContext, transaction.context)
+                XCTAssertEqual(controller.fetchRequest.entity?.managedObjectClassName, NSStringFromClass(TestEntity1.self))
+                XCTAssertEqual(controller.sectionNameKeyPath, #keyPath(TestEntity1.testString))
+                XCTAssertEqual(
+                    controller.fetchRequest.sortDescriptors!,
+                    OrderBy(.ascending(#keyPath(TestEntity1.testString))).sortDescriptors
+                )
+                XCTAssertEqual(
+                    controller.fetchRequest.predicate,
+                    Where("%@ > %d", #keyPath(TestEntity1.testEntityID), 100).predicate
+                )
+                XCTAssertEqual(controller.fetchRequest.fetchLimit, 10)
+            }
+        }
+    }
+}

CoreStoreTests/CoreStoreTests-Bridging-Header.h

@@ -0,0 +1,5 @@
+//
+//  Use this file to import your target's public headers that you would like to expose to Swift.
+//
+
+#import "BridgingTests.h"

CoreStoreTests/DynamicModelTests.swift

@@ -0,0 +1,211 @@
+//
+//  DynamicModelTests.swift
+//  CoreStore
+//
+//  Copyright © 2017 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+#if os(OSX)
+    typealias Color = NSColor
+#else
+    
+    typealias Color = UIColor
+#endif
+
+class Animal: CoreStoreObject {
+    
+    let species = Value.Required<String>("species", default: "Swift")
+    let master = Relationship.ToOne<Person>("master")
+    let color = Transformable.Optional<Color>("color")
+}
+
+class Dog: Animal {
+    
+    let nickname = Value.Optional<String>("nickname")
+    let age = Value.Required<Int>("age", default: 1)
+    let friends = Relationship.ToManyOrdered<Dog>("friends")
+    let friendedBy = Relationship.ToManyUnordered<Dog>("friendedBy", inverse: { $0.friends })
+}
+
+class Person: CoreStoreObject {
+    let title = Value.Required<String>("title", default: "Mr.")
+    let name = Value.Required<String>(
+        "name",
+        customGetter: { (`self`, getValue) in
+            
+            return "\(self.title.value) \(getValue())"
+        }
+    )
+    let pets = Relationship.ToManyUnordered<Animal>("pets", inverse: { $0.master })
+}
+
+
+// MARK: - DynamicModelTests
+
+class DynamicModelTests: BaseTestDataTestCase {
+    
+    func testDynamicModels_CanBeDeclaredCorrectly() {
+        
+        let dataStack = DataStack(
+            CoreStoreSchema(
+                modelVersion: "V1",
+                entities: [
+                    Entity<Animal>("Animal"),
+                    Entity<Dog>("Dog"),
+                    Entity<Person>("Person")
+                ],
+                versionLock: [
+                    "Animal": [0x1b59d511019695cf, 0xdeb97e86c5eff179, 0x1cfd80745646cb3, 0x4ff99416175b5b9a],
+                    "Dog": [0xe3f0afeb109b283a, 0x29998d292938eb61, 0x6aab788333cfc2a3, 0x492ff1d295910ea7],
+                    "Person": [0x66d8bbfd8b21561f, 0xcecec69ecae3570f, 0xc4b73d71256214ef, 0x89b99bfe3e013e8b]
+                ]
+            )
+        )
+        self.prepareStack(dataStack, configurations: [nil]) { (stack) in
+            
+            let k1 = Animal.keyPath({ $0.species })
+            XCTAssertEqual(k1, "species")
+            
+            let k2 = Dog.keyPath({ $0.species })
+            XCTAssertEqual(k2, "species")
+            
+            let k3 = Dog.keyPath({ $0.nickname })
+            XCTAssertEqual(k3, "nickname")
+            
+            let updateDone = self.expectation(description: "update-done")
+            let fetchDone = self.expectation(description: "fetch-done")
+            stack.perform(
+                asynchronous: { (transaction) in
+                    
+                    let animal = transaction.create(Into<Animal>())
+                    XCTAssertEqual(animal.species.value, "Swift")
+                    XCTAssertTrue(type(of: animal.species.value) == String.self)
+                    
+                    animal.species .= "Sparrow"
+                    XCTAssertEqual(animal.species.value, "Sparrow")
+                    
+                    animal.color .= .yellow
+                    XCTAssertEqual(animal.color.value, Color.yellow)
+                    
+                    let dog = transaction.create(Into<Dog>())
+                    XCTAssertEqual(dog.species.value, "Swift")
+                    XCTAssertEqual(dog.nickname.value, nil)
+                    XCTAssertEqual(dog.age.value, 1)
+                    
+                    dog.species .= "Dog"
+                    XCTAssertEqual(dog.species.value, "Dog")
+                    
+                    dog.nickname .= "Spot"
+                    XCTAssertEqual(dog.nickname.value, "Spot")
+                    
+                    let person = transaction.create(Into<Person>())
+                    XCTAssertTrue(person.pets.value.isEmpty)
+                    
+                    person.name .= "John"
+                    XCTAssertEqual(person.name.value, "Mr. John") // Custom getter
+                    
+                    person.title .= "Sir"
+                    XCTAssertEqual(person.name.value, "Sir John")
+                    
+                    person.pets.value.insert(dog)
+                    XCTAssertEqual(person.pets.count, 1)
+                    XCTAssertEqual(person.pets.value.first, dog)
+                    XCTAssertEqual(person.pets.value.first?.master.value, person)
+                    XCTAssertEqual(dog.master.value, person)
+                    XCTAssertEqual(dog.master.value?.pets.value.first, dog)
+                },
+                success: {
+                    
+                    updateDone.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            stack.perform(
+                asynchronous: { (transaction) in
+                    
+                    let p1 = Animal.where({ $0.species == "Sparrow" })
+                    XCTAssertEqual(p1.predicate, NSPredicate(format: "%K == %@", "species", "Sparrow"))
+                    
+                    let bird = transaction.fetchOne(From<Animal>(), p1)
+                    XCTAssertNotNil(bird)
+                    XCTAssertEqual(bird!.species.value, "Sparrow")
+                    
+                    let p2 = Dog.where({ $0.nickname == "Spot" })
+                    XCTAssertEqual(p2.predicate, NSPredicate(format: "%K == %@", "nickname", "Spot"))
+                    
+                    let dog = transaction.fetchOne(From<Dog>(), p2)
+                    XCTAssertNotNil(dog)
+                    XCTAssertEqual(dog!.nickname.value, "Spot")
+                    XCTAssertEqual(dog!.species.value, "Dog")
+                    
+                    let person = transaction.fetchOne(From<Person>())
+                    XCTAssertNotNil(person)
+                    XCTAssertEqual(person!.pets.value.first, dog)
+                    
+                    let p3 = Dog.where({ $0.age == 10 })
+                    XCTAssertEqual(p3.predicate, NSPredicate(format: "%K == %d", "age", 10))
+                },
+                success: {
+            
+                    fetchDone.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            self.waitAndCheckExpectations()
+        }
+    }
+    
+    @nonobjc
+    func prepareStack(_ dataStack: DataStack, configurations: [ModelConfiguration] = [nil], _ closure: (_ dataStack: DataStack) -> Void) {
+        
+        do {
+            
+            try configurations.forEach { (configuration) in
+                
+                try dataStack.addStorageAndWait(
+                    SQLiteStore(
+                        fileURL: SQLiteStore.defaultRootDirectory
+                            .appendingPathComponent(UUID().uuidString)
+                            .appendingPathComponent("\(type(of: self))_\((configuration ?? "-null-")).sqlite"),
+                        configuration: configuration,
+                        localStorageOptions: .recreateStoreOnModelMismatch
+                    )
+                )
+            }
+        }
+        catch let error as NSError {
+            
+            XCTFail(error.coreStoreDumpString)
+        }
+        closure(dataStack)
+    }
+}

CoreStoreTests/ErrorTests.swift

@@ -0,0 +1,174 @@
+//
+//  ErrorTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+// MARK: - ErrorTests
+
+final class ErrorTests: XCTestCase {
+
+    @objc
+    dynamic func test_ThatUnknownErrors_BridgeCorrectly() {
+        
+        let error = CoreStoreError.unknown
+        XCTAssertEqual((error as NSError).domain, CoreStoreErrorDomain)
+        XCTAssertEqual((error as NSError).code, CoreStoreErrorCode.unknownError.rawValue)
+        
+        let userInfo: NSDictionary = [:]
+        
+        let objcError = error.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError.bridgeToSwift)
+        XCTAssertEqual(objcError.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError.code, CoreStoreErrorCode.unknownError.rawValue)
+        XCTAssertEqual(objcError.userInfo as NSDictionary, userInfo)
+        
+        let objcError2 = objcError.bridgeToSwift.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError2.bridgeToSwift)
+        XCTAssertEqual(objcError2.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError2.code, CoreStoreErrorCode.unknownError.rawValue)
+        XCTAssertEqual(objcError2.userInfo as NSDictionary, userInfo)
+    }
+    
+    @objc
+    dynamic func test_ThatDifferentStorageExistsAtURLErrors_BridgeCorrectly() {
+        
+        let dummyURL = URL(string: "file:///test1/test2.sqlite")!
+        
+        let error = CoreStoreError.differentStorageExistsAtURL(existingPersistentStoreURL: dummyURL)
+        XCTAssertEqual((error as NSError).domain, CoreStoreErrorDomain)
+        XCTAssertEqual((error as NSError).code, CoreStoreErrorCode.differentStorageExistsAtURL.rawValue)
+        
+        let userInfo: NSDictionary = [
+            "existingPersistentStoreURL": dummyURL
+        ]
+        let objcError = error.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError.bridgeToSwift)
+        XCTAssertEqual(objcError.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError.code, CoreStoreErrorCode.differentStorageExistsAtURL.rawValue)
+        XCTAssertEqual(objcError.userInfo as NSDictionary, userInfo)
+        
+        let objcError2 = objcError.bridgeToSwift.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError2.bridgeToSwift)
+        XCTAssertEqual(objcError2.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError2.code, CoreStoreErrorCode.differentStorageExistsAtURL.rawValue)
+        XCTAssertEqual(objcError2.userInfo as NSDictionary, userInfo)
+    }
+    
+    @objc
+    dynamic func test_ThatMappingModelNotFoundErrors_BridgeCorrectly() {
+        
+        let dummyURL = URL(string: "file:///test1/test2.sqlite")!
+        
+        let schemaHistory = SchemaHistory(
+            XcodeDataModelSchema.from(
+                modelName: "Model",
+                bundle: Bundle(for: type(of: self))
+            )
+        )
+        let version = "1.0.0"
+        
+        let error = CoreStoreError.mappingModelNotFound(localStoreURL: dummyURL, targetModel: schemaHistory.rawModel, targetModelVersion: version)
+        XCTAssertEqual((error as NSError).domain, CoreStoreErrorDomain)
+        XCTAssertEqual((error as NSError).code, CoreStoreErrorCode.mappingModelNotFound.rawValue)
+        
+        let userInfo: NSDictionary = [
+            "localStoreURL": dummyURL,
+            "targetModel": schemaHistory.rawModel,
+            "targetModelVersion": version
+        ]
+        let objcError = error.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError.bridgeToSwift)
+        XCTAssertEqual(objcError.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError.code, CoreStoreErrorCode.mappingModelNotFound.rawValue)
+        XCTAssertEqual(objcError.userInfo as NSDictionary, userInfo)
+        
+        let objcError2 = objcError.bridgeToSwift.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError2.bridgeToSwift)
+        XCTAssertEqual(objcError2.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError2.code, CoreStoreErrorCode.mappingModelNotFound.rawValue)
+        XCTAssertEqual(objcError2.userInfo as NSDictionary, userInfo)
+    }
+    
+    @objc
+    dynamic func test_ThatProgressiveMigrationRequiredErrors_BridgeCorrectly() {
+        
+        let dummyURL = URL(string: "file:///test1/test2.sqlite")!
+        
+        let error = CoreStoreError.progressiveMigrationRequired(localStoreURL: dummyURL)
+        XCTAssertEqual((error as NSError).domain, CoreStoreErrorDomain)
+        XCTAssertEqual((error as NSError).code, CoreStoreErrorCode.progressiveMigrationRequired.rawValue)
+        
+        let userInfo: NSDictionary = [
+            "localStoreURL": dummyURL
+        ]
+        let objcError = error.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError.bridgeToSwift)
+        XCTAssertEqual(objcError.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError.code, CoreStoreErrorCode.progressiveMigrationRequired.rawValue)
+        XCTAssertEqual(objcError.userInfo as NSDictionary, userInfo)
+        
+        let objcError2 = objcError.bridgeToSwift.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError2.bridgeToSwift)
+        XCTAssertEqual(objcError2.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError2.code, CoreStoreErrorCode.progressiveMigrationRequired.rawValue)
+        XCTAssertEqual(objcError2.userInfo as NSDictionary, userInfo)
+    }
+    
+    @objc
+    dynamic func test_ThatInternalErrorErrors_BridgeCorrectly() {
+        
+        let internalError = NSError(
+            domain: "com.dummy",
+            code: 123,
+            userInfo: [
+                "key1": "value1",
+                "key2": 2,
+                "key3": Date()
+            ]
+        )
+        let error = CoreStoreError(internalError)
+        XCTAssertEqual((error as NSError).domain, CoreStoreErrorDomain)
+        XCTAssertEqual((error as NSError).code, CoreStoreErrorCode.internalError.rawValue)
+        
+        let userInfo: NSDictionary = [
+            "NSError": internalError
+        ]
+        let objcError = error.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError.bridgeToSwift)
+        XCTAssertEqual(objcError.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError.code, CoreStoreErrorCode.internalError.rawValue)
+        XCTAssertEqual(objcError.userInfo as NSDictionary, userInfo)
+        
+        let objcError2 = objcError.bridgeToSwift.bridgeToObjectiveC
+        XCTAssertEqual(error, objcError2.bridgeToSwift)
+        XCTAssertEqual(objcError2.domain, CoreStoreErrorDomain)
+        XCTAssertEqual(objcError2.code, CoreStoreErrorCode.internalError.rawValue)
+        XCTAssertEqual(objcError2.userInfo as NSDictionary, userInfo)
+    }
+}

CoreStoreTests/FromTests.swift

@@ -0,0 +1,429 @@
+//
+//  FromTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+//MARK: - FromTests
+
+final class FromTests: BaseTestCase {
+    
+    @objc
+    dynamic func test_ThatFromClauses_ConfigureCorrectly() {
+        
+        do {
+            
+            let from = From<NSManagedObject>()
+            XCTAssert(from.entityClass === NSManagedObject.self)
+            XCTAssertNil(from.configurations)
+        }
+        do {
+            
+            let from = From<TestEntity1>()
+            XCTAssert(from.entityClass === TestEntity1.self)
+            XCTAssertNil(from.configurations)
+        }
+        do {
+            
+            let from = From<TestEntity1>("Config1")
+            XCTAssert(from.entityClass === TestEntity1.self)
+            XCTAssertEqual(from.configurations?.count, 1)
+            XCTAssertEqual(from.configurations?[0], "Config1")
+        }
+        do {
+            
+            let from = From<TestEntity1>(nil, "Config1")
+            XCTAssert(from.entityClass === TestEntity1.self)
+            XCTAssertEqual(from.configurations?.count, 2)
+            XCTAssertEqual(from.configurations?[0], nil)
+            XCTAssertEqual(from.configurations?[1], "Config1")
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatFromClauses_ApplyToFetchRequestsCorrectlyForDefaultConfigurations() {
+        
+        self.prepareStack { (dataStack) in
+            
+            do {
+                
+                let from = From<TestEntity1>()
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["PF_DEFAULT_CONFIGURATION_NAME"])
+            }
+            do {
+                
+                let from = From<TestEntity1>("Config1")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatFromClauses_ApplyToFetchRequestsCorrectlyForSingleConfigurations() {
+        
+        self.prepareStack(configurations: ["Config1"]) { (dataStack) in
+            
+            do {
+                
+                let from = From<TestEntity1>()
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["Config1"])
+            }
+            do {
+                
+                let from = From<TestEntity1>("Config1")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["Config1"])
+            }
+            do {
+                
+                let from = From<TestEntity1>("Config2")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+            do {
+                
+                let from = From<TestEntity2>()
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+            do {
+                
+                let from = From<TestEntity2>("Config1")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+            do {
+                
+                let from = From<TestEntity2>("Config2")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatFromClauses_ApplyToFetchRequestsCorrectlyForDefaultAndCustomConfigurations() {
+        
+        self.prepareStack(configurations: [nil, "Config1"]) { (dataStack) in
+            
+            do {
+                
+                let from = From<TestEntity1>()
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(Set(affectedConfigurations), ["PF_DEFAULT_CONFIGURATION_NAME", "Config1"] as Set)
+            }
+            do {
+                
+                let from = From<TestEntity1>("Config1")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["Config1"])
+            }
+            do {
+                
+                let from = From<TestEntity1>("Config2")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+            do {
+                
+                let from = From<TestEntity2>()
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["PF_DEFAULT_CONFIGURATION_NAME"])
+            }
+            do {
+                
+                let from = From<TestEntity2>("Config1")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+            do {
+                
+                let from = From<TestEntity2>("Config2")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatFromClauses_ApplyToFetchRequestsCorrectlyForMultipleConfigurations() {
+        
+        self.prepareStack(configurations: ["Config1", "Config2"]) { (dataStack) in
+            
+            do {
+                
+                let from = From<TestEntity1>()
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["Config1"])
+            }
+            do {
+                
+                let from = From<TestEntity1>("Config1")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["Config1"])
+            }
+            do {
+                
+                let from = From<TestEntity1>("Config2")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+            do {
+                
+                let from = From<TestEntity2>()
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["Config2"])
+            }
+            do {
+                
+                let from = From<TestEntity2>("Config1")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = self.expectLogger([.logWarning]) {
+                    
+                    from.applyToFetchRequest(request, context: dataStack.mainContext)
+                }
+                XCTAssertFalse(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertTrue(affectedConfigurations.isEmpty)
+            }
+            do {
+                
+                let from = From<TestEntity2>("Config2")
+                
+                let request = CoreStoreFetchRequest()
+                let storesFound = from.applyToFetchRequest(request, context: dataStack.mainContext)
+                XCTAssertTrue(storesFound)
+                XCTAssertNotNil(request.entity)
+                XCTAssertNotNil(request.safeAffectedStores)
+                
+                XCTAssert(from.entityClass == NSClassFromString(request.entity!.managedObjectClassName))
+                
+                let affectedConfigurations = request.safeAffectedStores!.map { $0.configurationName }
+                XCTAssertEqual(affectedConfigurations, ["Config2"])
+            }
+        }
+    }
+}

CoreStoreTests/GroupByTests.swift

@@ -0,0 +1,81 @@
+//
+//  GroupByTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+//MARK: - GroupByTests
+
+final class GroupByTests: BaseTestCase {
+    
+    @objc
+    dynamic func test_ThatGroupByClauses_ConfigureCorrectly() {
+        
+        do {
+            
+            let groupBy = GroupBy()
+            XCTAssertEqual(groupBy, GroupBy([] as [String]))
+            XCTAssertNotEqual(groupBy, GroupBy("key"))
+            XCTAssertTrue(groupBy.keyPaths.isEmpty)
+        }
+        do {
+            
+            let groupBy = GroupBy("key1")
+            XCTAssertEqual(groupBy, GroupBy("key1"))
+            XCTAssertEqual(groupBy, GroupBy(["key1"]))
+            XCTAssertNotEqual(groupBy, GroupBy("key2"))
+            XCTAssertEqual(groupBy.keyPaths, ["key1"])
+        }
+        do {
+            
+            let groupBy = GroupBy("key1", "key2")
+            XCTAssertEqual(groupBy, GroupBy("key1", "key2"))
+            XCTAssertEqual(groupBy, GroupBy(["key1", "key2"]))
+            XCTAssertNotEqual(groupBy, GroupBy("key2", "key1"))
+            XCTAssertEqual(groupBy.keyPaths, ["key1", "key2"])
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatGroupByClauses_ApplyToFetchRequestsCorrectly() {
+        
+        self.prepareStack { (dataStack) in
+            
+            let groupBy = GroupBy(#keyPath(TestEntity1.testString))
+            
+            let request = CoreStoreFetchRequest()
+            _ = From<TestEntity1>().applyToFetchRequest(request, context: dataStack.mainContext)
+            groupBy.applyToFetchRequest(request)
+            
+            XCTAssertNotNil(request.propertiesToGroupBy)
+            
+            let attributes = (request.propertiesToGroupBy ?? []) as! [NSAttributeDescription]
+            XCTAssertEqual(attributes.map { $0.name }, groupBy.keyPaths)
+        }
+    }
+}

CoreStoreTests/Info.plist

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>

CoreStoreTests/IntoTests.swift

@@ -0,0 +1,139 @@
+//
+//  IntoTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+//MARK: - IntoTests
+
+final class IntoTests: XCTestCase {
+    
+    @objc
+    dynamic func test_ThatIntoClauseConstants_AreCorrect() {
+        
+        XCTAssertEqual(DataStack.defaultConfigurationName, "PF_DEFAULT_CONFIGURATION_NAME")
+    }
+    
+    @objc
+    dynamic func test_ThatIntoClauses_ConfigureCorrectly() {
+        
+        do {
+            
+            let into = Into<NSManagedObject>()
+            XCTAssert(into.entityClass === NSManagedObject.self)
+            XCTAssertNil(into.configuration)
+            XCTAssertTrue(into.inferStoreIfPossible)
+        }
+        do {
+            
+            let into = Into<TestEntity1>()
+            XCTAssert(into.entityClass === TestEntity1.self)
+            XCTAssertNil(into.configuration)
+            XCTAssertTrue(into.inferStoreIfPossible)
+        }
+        do {
+            
+            let into = Into(TestEntity1.self)
+            XCTAssert(into.entityClass === TestEntity1.self)
+            XCTAssertNil(into.configuration)
+            XCTAssertTrue(into.inferStoreIfPossible)
+        }
+        do {
+            
+            let into = Into<TestEntity1>("Config1")
+            XCTAssert(into.entityClass === TestEntity1.self)
+            XCTAssertEqual(into.configuration, "Config1")
+            XCTAssertFalse(into.inferStoreIfPossible)
+        }
+        do {
+            
+            let into = Into(TestEntity1.self, "Config1")
+            XCTAssert(into.entityClass === TestEntity1.self)
+            XCTAssertEqual(into.configuration, "Config1")
+            XCTAssertFalse(into.inferStoreIfPossible)
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatIntoClauses_AreEquatable() {
+        
+        do {
+            
+            let into = Into<NSManagedObject>()
+            XCTAssertEqual(into, Into<NSManagedObject>())
+            XCTAssertEqual(into, Into(NSManagedObject.self))
+            XCTAssertNotEqual(into, Into<NSManagedObject>(TestEntity1.self))
+            XCTAssertNotEqual(into, Into<NSManagedObject>("Config1"))
+        }
+        do {
+            
+            let into = Into<TestEntity1>()
+            XCTAssertEqual(into, Into<TestEntity1>())
+            XCTAssertEqual(into, Into(TestEntity1.self))
+            XCTAssertNotEqual(into, Into<TestEntity1>("Config1"))
+        }
+        do {
+            
+            let into = Into(TestEntity1.self)
+            XCTAssert(into == Into<TestEntity1>())
+            XCTAssertEqual(into, Into(TestEntity1.self))
+            XCTAssertFalse(into == Into<TestEntity1>("Config1"))
+        }
+        do {
+            
+            let into = Into<TestEntity1>("Config1")
+            XCTAssertEqual(into, Into(TestEntity1.self, "Config1"))
+            XCTAssertNotEqual(into, Into<TestEntity1>("Config2"))
+        }
+        do {
+            
+            let into = Into(TestEntity1.self, "Config1")
+            XCTAssertEqual(into, Into(TestEntity1.self, "Config1"))
+            XCTAssertEqual(into, Into<TestEntity1>("Config1"))
+            XCTAssertNotEqual(into, Into<TestEntity1>("Config2"))
+        }
+        do {
+            
+            let into = Into(TestEntity1.self, "Config1")
+            XCTAssertEqual(into, Into<TestEntity1>("Config1"))
+            XCTAssertEqual(into, Into(TestEntity1.self, "Config1"))
+            XCTAssertNotEqual(into, Into<TestEntity1>("Config2"))
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatIntoClauses_BridgeCorrectly() {
+        
+        do {
+            
+            let into = Into<NSManagedObject>()
+            let objcInto = into.bridgeToObjectiveC
+            XCTAssertEqual(into, objcInto.bridgeToSwift)
+        }
+    }
+}

CoreStoreTests/ListObserverTests.swift

@@ -0,0 +1,680 @@
+//
+//  ListObserverTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+// MARK: - ListObserverTests
+
+@available(OSX 10.12, *)
+class ListObserverTests: BaseTestDataTestCase {
+    
+    @objc
+    dynamic func test_ThatListObservers_CanReceiveInsertNotifications() {
+        
+        self.prepareStack { (stack) in
+            
+            let observer = TestListObserver()
+            let monitor = stack.monitorSectionedList(
+                From<TestEntity1>(),
+                SectionBy(#keyPath(TestEntity1.testBoolean)),
+                OrderBy(.ascending(#keyPath(TestEntity1.testBoolean)), .ascending(#keyPath(TestEntity1.testEntityID)))
+            )
+            monitor.addObserver(observer)
+            
+            XCTAssertFalse(monitor.hasSections())
+            XCTAssertFalse(monitor.hasObjects())
+            XCTAssertTrue(monitor.objectsInAllSections().isEmpty)
+            
+            var events = 0
+            
+            let willChangeExpectation = self.expectation(
+                forNotification: "listMonitorWillChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 0)
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 0
+                }
+            )
+            let didInsertSectionExpectation = self.expectation(
+                forNotification: "listMonitor:didInsertSection:toSectionIndex:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 1)
+                    XCTAssertEqual(
+                        ((note.userInfo as NSDictionary?) ?? [:]),
+                        [
+                            "sectionInfo": monitor.sectionInfoAtIndex(0),
+                            "sectionIndex": 0
+                        ] as NSDictionary
+                    )
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 1
+                }
+            )
+            let didInsertObjectExpectation = self.expectation(
+                forNotification: "listMonitor:didInsertObject:toIndexPath:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 2)
+                    
+                    let userInfo = note.userInfo
+                    XCTAssertNotNil(userInfo)
+                    XCTAssertEqual(
+                        Set(userInfo?.keys.map({ $0 as! String }) ?? []),
+                        ["indexPath", "object"]
+                    )
+                    
+                    let indexPath = userInfo?["indexPath"] as? NSIndexPath
+                    XCTAssertEqual(indexPath?.index(atPosition: 0), 0)
+                    XCTAssertEqual(indexPath?.index(atPosition: 1), 0)
+                    
+                    let object = userInfo?["object"] as? TestEntity1
+                    XCTAssertEqual(object?.testBoolean, NSNumber(value: true))
+                    XCTAssertEqual(object?.testNumber, NSNumber(value: 1))
+                    XCTAssertEqual(object?.testDecimal, NSDecimalNumber(string: "1"))
+                    XCTAssertEqual(object?.testString, "nil:TestEntity1:1")
+                    XCTAssertEqual(object?.testData, ("nil:TestEntity1:1" as NSString).data(using: String.Encoding.utf8.rawValue)!)
+                    XCTAssertEqual(object?.testDate, self.dateFormatter.date(from: "2000-01-01T00:00:00Z")!)
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 2
+                }
+            )
+            let didChangeExpectation = self.expectation(
+                forNotification: "listMonitorDidChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 3
+                }
+            )
+            let saveExpectation = self.expectation(description: "save")
+            stack.perform(
+                asynchronous: { (transaction) -> Bool in
+                    
+                    let object = transaction.create(Into<TestEntity1>())
+                    object.testBoolean = NSNumber(value: true)
+                    object.testNumber = NSNumber(value: 1)
+                    object.testDecimal = NSDecimalNumber(string: "1")
+                    object.testString = "nil:TestEntity1:1"
+                    object.testData = ("nil:TestEntity1:1" as NSString).data(using: String.Encoding.utf8.rawValue)!
+                    object.testDate = self.dateFormatter.date(from: "2000-01-01T00:00:00Z")!
+                    
+                    return transaction.hasChanges
+                },
+                success: { (hasChanges) in
+                    
+                    XCTAssertTrue(hasChanges)
+                    saveExpectation.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            self.waitAndCheckExpectations()
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatListObservers_CanReceiveUpdateNotifications() {
+        
+        self.prepareStack { (stack) in
+            
+            self.prepareTestDataForStack(stack)
+            
+            let observer = TestListObserver()
+            let monitor = stack.monitorSectionedList(
+                From<TestEntity1>(),
+                SectionBy(#keyPath(TestEntity1.testBoolean)),
+                OrderBy(.ascending(#keyPath(TestEntity1.testBoolean)), .ascending(#keyPath(TestEntity1.testEntityID)))
+            )
+            monitor.addObserver(observer)
+            
+            XCTAssertTrue(monitor.hasSections())
+            XCTAssertEqual(monitor.numberOfSections(), 2)
+            XCTAssertTrue(monitor.hasObjects())
+            XCTAssertTrue(monitor.hasObjectsInSection(0))
+            XCTAssertEqual(monitor.numberOfObjectsInSection(0), 2)
+            XCTAssertEqual(monitor.numberOfObjectsInSection(1), 3)
+            
+            var events = 0
+            
+            let willChangeExpectation = self.expectation(
+                forNotification: "listMonitorWillChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 0)
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 0
+                }
+            )
+            for _ in 1 ... 2 {
+                
+                let didUpdateObjectExpectation = self.expectation(
+                    forNotification: "listMonitor:didUpdateObject:atIndexPath:",
+                    object: observer,
+                    handler: { (note) -> Bool in
+                        
+                        XCTAssert(events == 1 || events == 2)
+                        
+                        let userInfo = note.userInfo
+                        XCTAssertNotNil(userInfo)
+                        XCTAssertEqual(
+                            Set(userInfo?.keys.map({ $0 as! String }) ?? []),
+                            ["indexPath", "object"]
+                        )
+                        
+                        let indexPath = userInfo?["indexPath"] as? NSIndexPath
+                        let object = userInfo?["object"] as? TestEntity1
+                        
+                        switch object?.testEntityID {
+                            
+                        case NSNumber(value: 101)?:
+                            XCTAssertEqual(indexPath?.index(atPosition: 0), 1)
+                            XCTAssertEqual(indexPath?.index(atPosition: 1), 0)
+                            
+                            XCTAssertEqual(object?.testBoolean, NSNumber(value: true))
+                            XCTAssertEqual(object?.testNumber, NSNumber(value: 11))
+                            XCTAssertEqual(object?.testDecimal, NSDecimalNumber(string: "11"))
+                            XCTAssertEqual(object?.testString, "nil:TestEntity1:11")
+                            XCTAssertEqual(object?.testData, ("nil:TestEntity1:11" as NSString).data(using: String.Encoding.utf8.rawValue)!)
+                            XCTAssertEqual(object?.testDate, self.dateFormatter.date(from: "2000-01-11T00:00:00Z")!)
+                            
+                        case NSNumber(value: 102)?:
+                            XCTAssertEqual(indexPath?.index(atPosition: 0), 0)
+                            XCTAssertEqual(indexPath?.index(atPosition: 1), 0)
+                            
+                            XCTAssertEqual(object?.testBoolean, NSNumber(value: false))
+                            XCTAssertEqual(object?.testNumber, NSNumber(value: 22))
+                            XCTAssertEqual(object?.testDecimal, NSDecimalNumber(string: "22"))
+                            XCTAssertEqual(object?.testString, "nil:TestEntity1:22")
+                            XCTAssertEqual(object?.testData, ("nil:TestEntity1:22" as NSString).data(using: String.Encoding.utf8.rawValue)!)
+                            XCTAssertEqual(object?.testDate, self.dateFormatter.date(from: "2000-01-22T00:00:00Z")!)
+                            
+                        default:
+                            XCTFail()
+                        }
+                        defer {
+                            
+                            events += 1
+                        }
+                        return events == 1 || events == 2
+                    }
+                )
+            }
+            let didChangeExpectation = self.expectation(
+                forNotification: "listMonitorDidChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 3)
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 3
+                }
+            )
+            let saveExpectation = self.expectation(description: "save")
+            stack.perform(
+                asynchronous: { (transaction) -> Bool in
+                    
+                    if let object = transaction.fetchOne(
+                        From<TestEntity1>(),
+                        Where(#keyPath(TestEntity1.testEntityID), isEqualTo: 101)) {
+                        
+                        object.testNumber = NSNumber(value: 11)
+                        object.testDecimal = NSDecimalNumber(string: "11")
+                        object.testString = "nil:TestEntity1:11"
+                        object.testData = ("nil:TestEntity1:11" as NSString).data(using: String.Encoding.utf8.rawValue)!
+                        object.testDate = self.dateFormatter.date(from: "2000-01-11T00:00:00Z")!
+                    }
+                    else {
+                        
+                        XCTFail()
+                    }
+                    if let object = transaction.fetchOne(
+                        From<TestEntity1>(),
+                        Where(#keyPath(TestEntity1.testEntityID), isEqualTo: 102)) {
+                        
+                        object.testNumber = NSNumber(value: 22)
+                        object.testDecimal = NSDecimalNumber(string: "22")
+                        object.testString = "nil:TestEntity1:22"
+                        object.testData = ("nil:TestEntity1:22" as NSString).data(using: String.Encoding.utf8.rawValue)!
+                        object.testDate = self.dateFormatter.date(from: "2000-01-22T00:00:00Z")!
+                    }
+                    else {
+                        
+                        XCTFail()
+                    }
+                    return transaction.hasChanges
+                },
+                success: { (hasChanges) in
+                    
+                    XCTAssertTrue(hasChanges)
+                    saveExpectation.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            self.waitAndCheckExpectations()
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatListObservers_CanReceiveMoveNotifications() {
+        
+        self.prepareStack { (stack) in
+            
+            self.prepareTestDataForStack(stack)
+            
+            let observer = TestListObserver()
+            let monitor = stack.monitorSectionedList(
+                From<TestEntity1>(),
+                SectionBy(#keyPath(TestEntity1.testBoolean)),
+                OrderBy(.ascending(#keyPath(TestEntity1.testBoolean)), .ascending(#keyPath(TestEntity1.testEntityID)))
+            )
+            monitor.addObserver(observer)
+            
+            var events = 0
+            
+            let willChangeExpectation = self.expectation(
+                forNotification: "listMonitorWillChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 0)
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 0
+                }
+            )
+            let didMoveObjectExpectation = self.expectation(
+                forNotification: "listMonitor:didMoveObject:fromIndexPath:toIndexPath:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 1)
+                    
+                    let userInfo = note.userInfo
+                    XCTAssertNotNil(userInfo)
+                    XCTAssertEqual(
+                        Set(userInfo?.keys.map({ $0 as! String }) ?? []),
+                        ["fromIndexPath", "toIndexPath", "object"]
+                    )
+                    
+                    let fromIndexPath = userInfo?["fromIndexPath"] as? NSIndexPath
+                    XCTAssertEqual(fromIndexPath?.index(atPosition: 0), 0)
+                    XCTAssertEqual(fromIndexPath?.index(atPosition: 1), 0)
+                    
+                    let toIndexPath = userInfo?["toIndexPath"] as? NSIndexPath
+                    XCTAssertEqual(toIndexPath?.index(atPosition: 0), 1)
+                    XCTAssertEqual(toIndexPath?.index(atPosition: 1), 1)
+                    
+                    let object = userInfo?["object"] as? TestEntity1
+                    XCTAssertEqual(object?.testEntityID, NSNumber(value: 102))
+                    XCTAssertEqual(object?.testBoolean, NSNumber(value: true))
+                    
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 1
+                }
+            )
+            let didChangeExpectation = self.expectation(
+                forNotification: "listMonitorDidChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 2)
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 2
+                }
+            )
+            let saveExpectation = self.expectation(description: "save")
+            stack.perform(
+                asynchronous: { (transaction) -> Bool in
+                    
+                    if let object = transaction.fetchOne(
+                        From<TestEntity1>(),
+                        Where(#keyPath(TestEntity1.testEntityID), isEqualTo: 102)) {
+                        
+                        object.testBoolean = NSNumber(value: true)
+                    }
+                    else {
+                        
+                        XCTFail()
+                    }
+                    return transaction.hasChanges
+                },
+                success: { (hasChanges) in
+                    
+                    XCTAssertTrue(hasChanges)
+                    saveExpectation.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            self.waitAndCheckExpectations()
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatListObservers_CanReceiveDeleteNotifications() {
+        
+        self.prepareStack { (stack) in
+            
+            self.prepareTestDataForStack(stack)
+            
+            let observer = TestListObserver()
+            let monitor = stack.monitorSectionedList(
+                From<TestEntity1>(),
+                SectionBy(#keyPath(TestEntity1.testBoolean)),
+                OrderBy(.ascending(#keyPath(TestEntity1.testBoolean)), .ascending(#keyPath(TestEntity1.testEntityID)))
+            )
+            monitor.addObserver(observer)
+            
+            var events = 0
+            
+            let willChangeExpectation = self.expectation(
+                forNotification: "listMonitorWillChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 0)
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 0
+                }
+            )
+            for _ in 1 ... 2 {
+                
+                let didUpdateObjectExpectation = self.expectation(
+                    forNotification: "listMonitor:didDeleteObject:fromIndexPath:",
+                    object: observer,
+                    handler: { (note) -> Bool in
+                        
+                        XCTAssert(events == 1 || events == 2)
+                        
+                        let userInfo = note.userInfo
+                        XCTAssertNotNil(userInfo)
+                        XCTAssertEqual(
+                            Set(userInfo?.keys.map({ $0 as! String }) ?? []),
+                            ["indexPath", "object"]
+                        )
+                        
+                        let indexPath = userInfo?["indexPath"] as? NSIndexPath
+                        
+                        XCTAssertEqual(indexPath?.section, 0)
+                        XCTAssert(indexPath?.index(atPosition: 1) == 0 || indexPath?.index(atPosition: 1) == 1)
+                        
+                        let object = userInfo?["object"] as? TestEntity1
+                        XCTAssertEqual(object?.isDeleted, true)
+                        
+                        defer {
+                            
+                            events += 1
+                        }
+                        return events == 1 || events == 2
+                    }
+                )
+            }
+            let didDeleteSectionExpectation = self.expectation(
+                forNotification: "listMonitor:didDeleteSection:fromSectionIndex:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 3)
+                    
+                    let userInfo = note.userInfo
+                    XCTAssertNotNil(userInfo)
+                    XCTAssertEqual(
+                        Set(userInfo?.keys.map({ $0 as! String }) ?? []),
+                        ["sectionInfo", "sectionIndex"]
+                    )
+                    
+                    let sectionInfo = userInfo?["sectionInfo"] as? NSFetchedResultsSectionInfo
+                    XCTAssertNotNil(sectionInfo)
+                    XCTAssertEqual(sectionInfo?.name, "0")
+                    
+                    let sectionIndex = userInfo?["sectionIndex"]
+                    XCTAssertEqual(sectionIndex as? NSNumber, NSNumber(value: 0))
+                    
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 3
+                }
+            )
+            let didChangeExpectation = self.expectation(
+                forNotification: "listMonitorDidChange:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 4)
+                    XCTAssertEqual((note.userInfo as NSDictionary?) ?? [:], NSDictionary())
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 4
+                }
+            )
+            let saveExpectation = self.expectation(description: "save")
+            stack.perform(
+                asynchronous: { (transaction) -> Bool in
+                    
+                    transaction.deleteAll(
+                        From<TestEntity1>(),
+                        Where(#keyPath(TestEntity1.testBoolean), isEqualTo: false)
+                    )
+                    return transaction.hasChanges
+                },
+                success: { (hasChanges) in
+                    
+                    XCTAssertTrue(hasChanges)
+                    saveExpectation.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            self.waitAndCheckExpectations()
+        }
+    }
+}
+
+
+// MARK: TestListObserver
+
+@available(OSX 10.12, *)
+class TestListObserver: ListSectionObserver {
+    
+    // MARK: ListObserver
+    
+    typealias ListEntityType = TestEntity1
+    
+    func listMonitorWillChange(_ monitor: ListMonitor<TestEntity1>) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitorWillChange:"),
+            object: self,
+            userInfo: [:]
+        )
+    }
+    
+    func listMonitorDidChange(_ monitor: ListMonitor<TestEntity1>) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitorDidChange:"),
+            object: self,
+            userInfo: [:]
+        )
+    }
+    
+    func listMonitorWillRefetch(_ monitor: ListMonitor<TestEntity1>) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitorWillRefetch:"),
+            object: self,
+            userInfo: [:]
+        )
+    }
+    
+    func listMonitorDidRefetch(_ monitor: ListMonitor<TestEntity1>) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitorDidRefetch:"),
+            object: self,
+            userInfo: [:]
+        )
+    }
+    
+    
+    // MARK: ListObjectObserver
+    
+    func listMonitor(_ monitor: ListMonitor<TestEntity1>, didInsertObject object: TestEntity1, toIndexPath indexPath: IndexPath) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitor:didInsertObject:toIndexPath:"),
+            object: self,
+            userInfo: [
+                "object": object,
+                "indexPath": indexPath
+            ]
+        )
+    }
+    
+    func listMonitor(_ monitor: ListMonitor<TestEntity1>, didDeleteObject object: TestEntity1, fromIndexPath indexPath: IndexPath) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitor:didDeleteObject:fromIndexPath:"),
+            object: self,
+            userInfo: [
+                "object": object,
+                "indexPath": indexPath
+            ]
+        )
+    }
+    
+    func listMonitor(_ monitor: ListMonitor<TestEntity1>, didUpdateObject object: TestEntity1, atIndexPath indexPath: IndexPath) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitor:didUpdateObject:atIndexPath:"),
+            object: self,
+            userInfo: [
+                "object": object,
+                "indexPath": indexPath
+            ]
+        )
+    }
+    
+    
+    func listMonitor(_ monitor: ListMonitor<TestEntity1>, didMoveObject object: TestEntity1, fromIndexPath: IndexPath, toIndexPath: IndexPath) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitor:didMoveObject:fromIndexPath:toIndexPath:"),
+            object: self,
+            userInfo: [
+                "object": object,
+                "fromIndexPath": fromIndexPath,
+                "toIndexPath": toIndexPath
+            ]
+        )
+    }
+    
+    
+    // MARK: ListSectionObserver
+    
+    func listMonitor(_ monitor: ListMonitor<TestEntity1>, didInsertSection sectionInfo: NSFetchedResultsSectionInfo, toSectionIndex sectionIndex: Int) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitor:didInsertSection:toSectionIndex:"),
+            object: self,
+            userInfo: [
+                "sectionInfo": sectionInfo,
+                "sectionIndex": sectionIndex
+            ]
+        )
+    }
+    
+    func listMonitor(_ monitor: ListMonitor<TestEntity1>, didDeleteSection sectionInfo: NSFetchedResultsSectionInfo, fromSectionIndex sectionIndex: Int) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "listMonitor:didDeleteSection:fromSectionIndex:"),
+            object: self,
+            userInfo: [
+                "sectionInfo": sectionInfo,
+                "sectionIndex": sectionIndex
+            ]
+        )
+    }
+}

CoreStoreTests/MigrationChainTests.swift

@@ -0,0 +1,147 @@
+//
+//  MigrationChainTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+// MARK: - MigrationChainTests
+
+final class MigrationChainTests: XCTestCase {
+    
+    @objc
+    dynamic func test_ThatNilMigrationChains_HaveNoVersions() {
+        
+        let chain: MigrationChain = nil
+        XCTAssertTrue(chain.isValid)
+        XCTAssertTrue(chain.isEmpty)
+        
+        XCTAssertFalse(chain.contains("version1"))
+        XCTAssertNil(chain.nextVersionFrom("version1"))
+    }
+    
+    @objc
+    dynamic func test_ThatStringMigrationChains_HaveOneVersion() {
+        
+        let chain: MigrationChain = "version1"
+        XCTAssertTrue(chain.isValid)
+        XCTAssertTrue(chain.isEmpty)
+        
+        XCTAssertTrue(chain.contains("version1"))
+        XCTAssertFalse(chain.contains("version2"))
+        
+        XCTAssertNil(chain.nextVersionFrom("version1"))
+        XCTAssertNil(chain.nextVersionFrom("version2"))
+    }
+    
+    @objc
+    dynamic func test_ThatArrayMigrationChains_HaveLinearVersions() {
+        
+        let chain: MigrationChain = ["version1", "version2", "version3", "version4"]
+        XCTAssertTrue(chain.isValid)
+        XCTAssertFalse(chain.isEmpty)
+        
+        XCTAssertTrue(chain.contains("version1"))
+        XCTAssertTrue(chain.contains("version2"))
+        XCTAssertTrue(chain.contains("version3"))
+        XCTAssertTrue(chain.contains("version4"))
+        XCTAssertFalse(chain.contains("version5"))
+        
+        XCTAssertEqual(chain.nextVersionFrom("version1"), "version2")
+        XCTAssertEqual(chain.nextVersionFrom("version2"), "version3")
+        XCTAssertEqual(chain.nextVersionFrom("version3"), "version4")
+        XCTAssertNil(chain.nextVersionFrom("version4"))
+        XCTAssertNil(chain.nextVersionFrom("version5"))
+    }
+    
+    @objc
+    dynamic func test_ThatDictionaryMigrationChains_HaveTreeVersions() {
+        
+        let chain: MigrationChain = [
+            "version1": "version4",
+            "version2": "version3",
+            "version3": "version4"
+        ]
+        XCTAssertTrue(chain.isValid)
+        XCTAssertFalse(chain.isEmpty)
+        
+        XCTAssertTrue(chain.contains("version1"))
+        XCTAssertTrue(chain.contains("version2"))
+        XCTAssertTrue(chain.contains("version3"))
+        XCTAssertTrue(chain.contains("version4"))
+        XCTAssertFalse(chain.contains("version5"))
+        
+        XCTAssertEqual(chain.nextVersionFrom("version1"), "version4")
+        XCTAssertEqual(chain.nextVersionFrom("version2"), "version3")
+        XCTAssertEqual(chain.nextVersionFrom("version3"), "version4")
+        XCTAssertNil(chain.nextVersionFrom("version4"))
+        XCTAssertNil(chain.nextVersionFrom("version5"))
+        
+// The cases below will trigger assertion failures internally
+
+//        let linearLoopChain: MigrationChain = ["version1", "version2", "version1", "version3", "version4"]
+//        XCTAssertFalse(linearLoopChain.valid, "linearLoopChain.valid")
+//
+//        let treeAmbiguousChain: MigrationChain = [
+//            "version1": "version4",
+//            "version2": "version3",
+//            "version1": "version2",
+//            "version3": "version4"
+//        ]
+//        XCTAssertFalse(treeAmbiguousChain.valid, "treeAmbiguousChain.valid")
+    }
+    
+    @objc
+    dynamic func test_ThatMigrationChains_AreEquatable() {
+        
+        do {
+            
+            let chain1: MigrationChain = nil
+            let chain2: MigrationChain = []
+            let chain3: MigrationChain = [:]
+            XCTAssertEqual(chain1, chain2)
+            XCTAssertEqual(chain2, chain3)
+            XCTAssertEqual(chain3, chain1)
+        }
+        do {
+            
+            let chain1: MigrationChain = "version1"
+            let chain2: MigrationChain = ["version1"]
+            XCTAssertEqual(chain1, chain2)
+        }
+        do {
+            
+            let chain1: MigrationChain = ["version1", "version2", "version3", "version4"]
+            let chain2: MigrationChain = [
+                "version1": "version2",
+                "version2": "version3",
+                "version3": "version4"
+            ]
+            XCTAssertEqual(chain1, chain2)
+        }
+    }
+}

CoreStoreTests/Model.xcdatamodeld/Model.xcdatamodel/contents

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="11759" systemVersion="16C67" minimumToolsVersion="Xcode 4.3" sourceLanguage="Objective-C" userDefinedModelVersionIdentifier="">
+    <entity name="TestEntity1AAA" representedClassName="CoreStoreTests.TestEntity1" syncable="YES">
+        <attribute name="testBoolean" optional="YES" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testData" optional="YES" attributeType="Binary" syncable="YES"/>
+        <attribute name="testDate" optional="YES" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testDecimal" optional="YES" attributeType="Decimal" syncable="YES"/>
+        <attribute name="testEntityID" optional="YES" attributeType="Integer 64" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testNil" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="testNumber" optional="YES" attributeType="Integer 32" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testString" optional="YES" attributeType="String" syncable="YES"/>
+    </entity>
+    <entity name="TestEntity2" representedClassName="CoreStoreTests.TestEntity2" syncable="YES">
+        <attribute name="testBoolean" optional="YES" attributeType="Boolean" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testData" optional="YES" attributeType="Binary" syncable="YES"/>
+        <attribute name="testDate" optional="YES" attributeType="Date" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testDecimal" optional="YES" attributeType="Decimal" syncable="YES"/>
+        <attribute name="testEntityID" optional="YES" attributeType="Integer 64" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testNil" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="testNumber" optional="YES" attributeType="Integer 32" usesScalarValueType="NO" syncable="YES"/>
+        <attribute name="testString" optional="YES" attributeType="String" syncable="YES"/>
+    </entity>
+    <configuration name="Config1">
+        <memberEntity name="TestEntity1AAA"/>
+    </configuration>
+    <configuration name="Config2">
+        <memberEntity name="TestEntity2"/>
+    </configuration>
+    <elements>
+        <element name="TestEntity1AAA" positionX="-63" positionY="-18" width="128" height="165"/>
+        <element name="TestEntity2" positionX="-63" positionY="9" width="128" height="165"/>
+    </elements>
+</model>

CoreStoreTests/ObjectObserverTests.swift

@@ -0,0 +1,244 @@
+//
+//  ObjectObserverTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+// MARK: - ObjectObserverTests
+
+@available(OSX 10.12, *)
+class ObjectObserverTests: BaseTestDataTestCase {
+    
+    @objc
+    dynamic func test_ThatObjectObservers_CanReceiveUpdateNotifications() {
+        
+        self.prepareStack { (stack) in
+            
+            self.prepareTestDataForStack(stack)
+            
+            guard let object = stack.fetchOne(
+                From<TestEntity1>(),
+                Where(#keyPath(TestEntity1.testEntityID), isEqualTo: 101)) else {
+                    
+                    XCTFail()
+                    return
+            }
+            let observer = TestObjectObserver()
+            let monitor = stack.monitorObject(object)
+            monitor.addObserver(observer)
+            
+            XCTAssertEqual(monitor.object, object)
+            XCTAssertFalse(monitor.isObjectDeleted)
+            
+            var events = 0
+            
+            let willUpdateExpectation = self.expectation(
+                forNotification: "objectMonitor:willUpdateObject:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 0)
+                    XCTAssertEqual(
+                        ((note.userInfo as NSDictionary?) ?? [:]),
+                        ["object": object] as NSDictionary
+                    )
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 0
+                }
+            )
+            let didUpdateExpectation = self.expectation(
+                forNotification: "objectMonitor:didUpdateObject:changedPersistentKeys:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 1)
+                    XCTAssertEqual(
+                        ((note.userInfo as NSDictionary?) ?? [:]),
+                        [
+                            "object": object,
+                            "changedPersistentKeys": Set(
+                                [
+                                    #keyPath(TestEntity1.testNumber),
+                                    #keyPath(TestEntity1.testString)
+                                ]
+                            )
+                        ] as NSDictionary
+                    )
+                    let object = note.userInfo?["object"] as? TestEntity1
+                    XCTAssertEqual(object?.testNumber, NSNumber(value: 10))
+                    XCTAssertEqual(object?.testString, "nil:TestEntity1:10")
+                    
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 1
+                }
+            )
+            let saveExpectation = self.expectation(description: "save")
+            stack.perform(
+                asynchronous: { (transaction) -> Bool in
+                    
+                    guard let object = transaction.edit(object) else {
+                        
+                        XCTFail()
+                        try transaction.cancel()
+                    }
+                    object.testNumber = NSNumber(value: 10)
+                    object.testString = "nil:TestEntity1:10"
+                    
+                    return transaction.hasChanges
+                },
+                success: { (hasChanges) in
+                    
+                    XCTAssertTrue(hasChanges)
+                    saveExpectation.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            self.waitAndCheckExpectations()
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatObjectObservers_CanReceiveDeleteNotifications() {
+        
+        self.prepareStack { (stack) in
+            
+            self.prepareTestDataForStack(stack)
+            
+            guard let object = stack.fetchOne(
+                From<TestEntity1>(),
+                Where(#keyPath(TestEntity1.testEntityID), isEqualTo: 101)) else {
+                    
+                    XCTFail()
+                    return
+            }
+            let observer = TestObjectObserver()
+            let monitor = stack.monitorObject(object)
+            monitor.addObserver(observer)
+            
+            XCTAssertEqual(monitor.object, object)
+            XCTAssertFalse(monitor.isObjectDeleted)
+            
+            var events = 0
+            
+            let didDeleteExpectation = self.expectation(
+                forNotification: "objectMonitor:didDeleteObject:",
+                object: observer,
+                handler: { (note) -> Bool in
+                    
+                    XCTAssertEqual(events, 0)
+                    XCTAssertEqual(
+                        ((note.userInfo as NSDictionary?) ?? [:]),
+                        ["object": object] as NSDictionary
+                    )
+                    defer {
+                        
+                        events += 1
+                    }
+                    return events == 0
+                }
+            )
+            let saveExpectation = self.expectation(description: "save")
+            stack.perform(
+                asynchronous: { (transaction) -> Bool in
+                    
+                    guard let object = transaction.edit(object) else {
+                        
+                        XCTFail()
+                        try transaction.cancel()
+                    }
+                    transaction.delete(object)
+                    
+                    return transaction.hasChanges
+                },
+                success: { (hasChanges) in
+                    
+                    XCTAssertTrue(hasChanges)
+                    XCTAssertTrue(monitor.isObjectDeleted)
+                    saveExpectation.fulfill()
+                },
+                failure: { _ in
+                    
+                    XCTFail()
+                }
+            )
+            self.waitAndCheckExpectations()
+        }
+    }
+}
+
+
+// MARK: TestObjectObserver
+
+@available(OSX 10.12, *)
+class TestObjectObserver: ObjectObserver {
+    
+    typealias ObjectEntityType = TestEntity1
+    
+    func objectMonitor(_ monitor: ObjectMonitor<TestEntity1>, willUpdateObject object: TestEntity1) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "objectMonitor:willUpdateObject:"),
+            object: self,
+            userInfo: [
+                "object": object
+            ]
+        )
+    }
+    
+    func objectMonitor(_ monitor: ObjectMonitor<TestEntity1>, didUpdateObject object: TestEntity1, changedPersistentKeys: Set<KeyPath>) {
+        
+        NotificationCenter.default.post(
+            name: NSNotification.Name(rawValue: "objectMonitor:didUpdateObject:changedPersistentKeys:"),
+            object: self,
+            userInfo: [
+                "object": object,
+                "changedPersistentKeys": changedPersistentKeys
+            ]
+        )
+    }
+    
+    func objectMonitor(_ monitor: ObjectMonitor<TestEntity1>, didDeleteObject object: TestEntity1) {
+        
+        NotificationCenter.default.post(
+            name: Notification.Name(rawValue: "objectMonitor:didDeleteObject:"),
+            object: self,
+            userInfo: [
+                "object": object
+            ]
+        )
+    }
+}

CoreStoreTests/OrderByTests.swift

@@ -0,0 +1,187 @@
+//
+//  OrderByTests.swift
+//  CoreStore
+//
+//  Copyright © 2016 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import XCTest
+
+@testable
+import CoreStore
+
+
+//MARK: - OrderByTests
+
+final class OrderByTests: XCTestCase {
+    
+    @objc
+    dynamic func test_ThatOrderByClauses_ConfigureCorrectly() {
+        
+        do {
+            
+            let orderBy = OrderBy()
+            XCTAssertEqual(orderBy, OrderBy([NSSortDescriptor]()))
+            XCTAssertNotEqual(orderBy, OrderBy(NSSortDescriptor(key: "key", ascending: false)))
+            XCTAssertTrue(orderBy.sortDescriptors.isEmpty)
+        }
+        do {
+            
+            let sortDescriptor = NSSortDescriptor(key: "key1", ascending: true)
+            let orderBy = OrderBy(sortDescriptor)
+            XCTAssertEqual(orderBy, OrderBy(sortDescriptor))
+            XCTAssertEqual(orderBy, OrderBy(.ascending("key1")))
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key2")))
+            XCTAssertNotEqual(orderBy, OrderBy(.descending("key1")))
+            XCTAssertNotEqual(orderBy, OrderBy(NSSortDescriptor(key: "key1", ascending: false)))
+            XCTAssertEqual(orderBy, OrderBy([sortDescriptor]))
+            XCTAssertEqual(orderBy.sortDescriptors, [sortDescriptor])
+        }
+        do {
+            
+            let sortDescriptors = [
+                NSSortDescriptor(key: "key1", ascending: true),
+                NSSortDescriptor(key: "key2", ascending: false)
+            ]
+            let orderBy = OrderBy(sortDescriptors)
+            XCTAssertEqual(orderBy, OrderBy(sortDescriptors))
+            XCTAssertEqual(orderBy, OrderBy(.ascending("key1"), .descending("key2")))
+            XCTAssertNotEqual(
+                orderBy,
+                OrderBy(
+                    [
+                        NSSortDescriptor(key: "key1", ascending: false),
+                        NSSortDescriptor(key: "key2", ascending: false)
+                    ]
+                )
+            )
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key1"), .ascending("key2")))
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key1"), .descending("key3")))
+            XCTAssertEqual(orderBy.sortDescriptors, sortDescriptors)
+        }
+        do {
+            
+            let orderBy = OrderBy(.ascending("key1"))
+            let sortDescriptor = NSSortDescriptor(key: "key1", ascending: true)
+            XCTAssertEqual(orderBy, OrderBy(sortDescriptor))
+            XCTAssertEqual(orderBy, OrderBy(.ascending("key1")))
+            XCTAssertNotEqual(orderBy, OrderBy(.descending("key1")))
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key2")))
+            XCTAssertEqual(orderBy, OrderBy([sortDescriptor]))
+            XCTAssertEqual(orderBy.sortDescriptors, [sortDescriptor])
+        }
+        do {
+            
+            let orderBy = OrderBy(.ascending("key1"), .descending("key2"))
+            let sortDescriptors = [
+                NSSortDescriptor(key: "key1", ascending: true),
+                NSSortDescriptor(key: "key2", ascending: false)
+            ]
+            XCTAssertEqual(orderBy, OrderBy(sortDescriptors))
+            XCTAssertEqual(orderBy, OrderBy(.ascending("key1"), .descending("key2")))
+            XCTAssertNotEqual(
+                orderBy,
+                OrderBy(
+                    [
+                        NSSortDescriptor(key: "key1", ascending: false),
+                        NSSortDescriptor(key: "key2", ascending: false)
+                    ]
+                )
+            )
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key1"), .ascending("key2")))
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key1"), .descending("key3")))
+            XCTAssertEqual(orderBy.sortDescriptors, sortDescriptors)
+        }
+        do {
+            
+            let sortKeys: [SortKey] = [.ascending("key1"), .descending("key2")]
+            let orderBy = OrderBy(sortKeys)
+            let sortDescriptors = [
+                NSSortDescriptor(key: "key1", ascending: true),
+                NSSortDescriptor(key: "key2", ascending: false)
+            ]
+            XCTAssertEqual(orderBy, OrderBy(sortDescriptors))
+            XCTAssertEqual(orderBy, OrderBy(.ascending("key1"), .descending("key2")))
+            XCTAssertNotEqual(
+                orderBy,
+                OrderBy(
+                    [
+                        NSSortDescriptor(key: "key1", ascending: false),
+                        NSSortDescriptor(key: "key2", ascending: false)
+                    ]
+                )
+            )
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key1"), .ascending("key2")))
+            XCTAssertNotEqual(orderBy, OrderBy(.ascending("key1"), .descending("key3")))
+            XCTAssertEqual(orderBy.sortDescriptors, sortDescriptors)
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatOrderByClauseOperations_ComputeCorrectly() {
+        
+        let orderBy1 = OrderBy(.ascending("key1"))
+        let orderBy2 = OrderBy(.descending("key2"))
+        let orderBy3 = OrderBy(.ascending("key3"))
+        
+        do {
+            
+            let plusOrderBy = orderBy1 + orderBy2 + orderBy3
+            XCTAssertEqual(plusOrderBy, OrderBy(.ascending("key1"), .descending("key2"), .ascending("key3")))
+            XCTAssertEqual(plusOrderBy, OrderBy(.ascending("key1")) + OrderBy(.descending("key2"), .ascending("key3")))
+            XCTAssertNotEqual(plusOrderBy, orderBy1 + orderBy3 + orderBy2)
+            XCTAssertNotEqual(plusOrderBy, orderBy2 + orderBy1 + orderBy3)
+            XCTAssertNotEqual(plusOrderBy, orderBy2 + orderBy3 + orderBy1)
+            XCTAssertNotEqual(plusOrderBy, orderBy3 + orderBy1 + orderBy2)
+            XCTAssertNotEqual(plusOrderBy, orderBy3 + orderBy2 + orderBy1)
+            XCTAssertEqual(plusOrderBy.sortDescriptors, orderBy1.sortDescriptors + orderBy2.sortDescriptors + orderBy3.sortDescriptors)
+        }
+        do {
+            
+            var plusOrderBy = orderBy1
+            plusOrderBy += orderBy2
+            XCTAssertEqual(plusOrderBy, OrderBy(.ascending("key1"), .descending("key2")))
+            XCTAssertEqual(plusOrderBy, OrderBy(.ascending("key1")) + OrderBy(.descending("key2")))
+            XCTAssertNotEqual(plusOrderBy, orderBy2 + orderBy1)
+            XCTAssertEqual(plusOrderBy.sortDescriptors, orderBy1.sortDescriptors + orderBy2.sortDescriptors)
+            
+            plusOrderBy += orderBy3
+            XCTAssertEqual(plusOrderBy, OrderBy(.ascending("key1"), .descending("key2"), .ascending("key3")))
+            XCTAssertEqual(plusOrderBy, OrderBy(.ascending("key1"), .descending("key2")) + OrderBy(.ascending("key3")))
+            XCTAssertNotEqual(plusOrderBy, orderBy1 + orderBy3 + orderBy2)
+            XCTAssertNotEqual(plusOrderBy, orderBy2 + orderBy1 + orderBy3)
+            XCTAssertNotEqual(plusOrderBy, orderBy2 + orderBy3 + orderBy1)
+            XCTAssertNotEqual(plusOrderBy, orderBy3 + orderBy1 + orderBy2)
+            XCTAssertNotEqual(plusOrderBy, orderBy3 + orderBy2 + orderBy1)
+            XCTAssertEqual(plusOrderBy.sortDescriptors, orderBy1.sortDescriptors + orderBy2.sortDescriptors + orderBy3.sortDescriptors)
+        }
+    }
+    
+    @objc
+    dynamic func test_ThatOrderByClauses_ApplyToFetchRequestsCorrectly() {
+        
+        let orderBy = OrderBy(.ascending("key"))
+        let request = CoreStoreFetchRequest()
+        orderBy.applyToFetchRequest(request)
+        XCTAssertNotNil(request.sortDescriptors)
+        XCTAssertEqual(request.sortDescriptors ?? [], orderBy.sortDescriptors)
+    }
+}