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prototype for CoreStoreObject property observers (a.k.a. KVO)

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John Estropia
2018-12-14 18:20:42 +09:00
parent 8409a13289
commit 10cd18dbf0
5 changed files with 613 additions and 0 deletions
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36
CoreStoreTests/DynamicModelTests.swift
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@@ -143,6 +143,9 @@ class DynamicModelTests: BaseTestDataTestCase {
let updateDone = self.expectation(description: "update-done")
let fetchDone = self.expectation(description: "fetch-done")
let willSetPriorObserverDone = self.expectation(description: "willSet-observe-prior-done")
let willSetNotPriorObserverDone = self.expectation(description: "willSet-observe-notPrior-done")
let didSetObserverDone = self.expectation(description: "didSet-observe-done")
stack.perform(
asynchronous: { (transaction) in
@@ -160,9 +163,42 @@ class DynamicModelTests: BaseTestDataTestCase {
XCTAssertEqual(dog.species.value, "Swift")
XCTAssertEqual(dog.nickname.value, nil)
XCTAssertEqual(dog.age.value, 1)
let didSetObserver = dog.species.observe(options: [.new, .old]) { (object, change) in
XCTAssertEqual(object, dog)
XCTAssertEqual(change.kind, .setting)
XCTAssertEqual(change.newValue, "Dog")
XCTAssertEqual(change.oldValue, "Swift")
XCTAssertFalse(change.isPrior)
XCTAssertEqual(object.species.value, "Dog")
didSetObserverDone.fulfill()
}
let willSetObserver = dog.species.observe(options: [.new, .old, .prior]) { (object, change) in
XCTAssertEqual(object, dog)
XCTAssertEqual(change.kind, .setting)
XCTAssertEqual(change.oldValue, "Swift")
if change.isPrior {
XCTAssertNil(change.newValue)
XCTAssertEqual(object.species.value, "Swift")
willSetPriorObserverDone.fulfill()
}
else {
XCTAssertEqual(change.newValue, "Dog")
XCTAssertEqual(object.species.value, "Dog")
willSetNotPriorObserverDone.fulfill()
}
}
dog.species .= "Dog"
XCTAssertEqual(dog.species.value, "Dog")
didSetObserver.invalidate()
willSetObserver.invalidate()
dog.nickname .= "Spot"
XCTAssertEqual(dog.nickname.value, "Spot")