How to make unit test case #263

New Issue

Closed

opened 2025-12-29 15:27:50 +01:00 by adam · 2 comments

adam commented 2025-12-29 15:27:50 +01:00

Owner

Copy Link

Copy Source

Originally created by @jshl8612 on GitHub (Apr 11, 2019).

Here is my test code in unit test

    func testInsert() {
        // 1. Arrange
        let dataStack: DataStack = {
            let dataStack = DataStack(xcodeModelName: "Model")
            do {
                try dataStack.addStorageAndWait(InMemoryStore())
            } catch let error {
                XCTFail("Cannot set up database storage: \(error)")
            }
            return dataStack
        }()
        
        // 2. Action
        do {
            try dataStack.perform(synchronous: { transaction in
                let object = transaction.create(Into<Food>())
                object.name = "Test"
        
            })
        } catch let error {
            XCTFail("Cannot perform database transaction: \(error)")
        }
        
        // 3. Assert
        do {
            try dataStack.perform(synchronous: { transaction in
                guard try transaction.fetchOne(From<Food>(), Where<Food>("name", isEqualTo: "Test")) != nil else {
                    XCTFail("Cannot get database object")
                    return
                }
            })
        } catch let error {
            XCTFail("Cannot perform database transaction: \(error)")
        }
    }

It crashes on From.swift with a "Fatal error: Unexpectedly found nil while unwrapping an Optional value" log.

    internal func applyToFetchRequest<U>(_ fetchRequest: CoreStoreFetchRequest<U>, context: NSManagedObjectContext, applyAffectedStores: Bool = true) throws {
        
        🚫fetchRequest.entity = context.parentStack!.entityDescription(for: EntityIdentifier(self.entityClass))!🚫
        guard applyAffectedStores else {
            
            return
        }
        do {

            try self.applyAffectedStoresForFetchedRequest(fetchRequest, context: context)
        }
        catch let error as CoreStoreError {

            CoreStore.log(
                error,
                "Attempted to perform a fetch but could not find any persistent store for the entity \(cs_typeName(fetchRequest.entityName))"
            )
            throw error
        }
        catch {

            throw error
        }
    }

Could you help me out? Thanks~~

Originally created by @jshl8612 on GitHub (Apr 11, 2019). Here is my test code in unit test ```swift func testInsert() { // 1. Arrange let dataStack: DataStack = { let dataStack = DataStack(xcodeModelName: "Model") do { try dataStack.addStorageAndWait(InMemoryStore()) } catch let error { XCTFail("Cannot set up database storage: \(error)") } return dataStack }() // 2. Action do { try dataStack.perform(synchronous: { transaction in let object = transaction.create(Into<Food>()) object.name = "Test" }) } catch let error { XCTFail("Cannot perform database transaction: \(error)") } // 3. Assert do { try dataStack.perform(synchronous: { transaction in guard try transaction.fetchOne(From<Food>(), Where<Food>("name", isEqualTo: "Test")) != nil else { XCTFail("Cannot get database object") return } }) } catch let error { XCTFail("Cannot perform database transaction: \(error)") } } ``` It crashes on From.swift with a "Fatal error: Unexpectedly found nil while unwrapping an Optional value" log. ```swift internal func applyToFetchRequest<U>(_ fetchRequest: CoreStoreFetchRequest<U>, context: NSManagedObjectContext, applyAffectedStores: Bool = true) throws { 🚫fetchRequest.entity = context.parentStack!.entityDescription(for: EntityIdentifier(self.entityClass))!🚫 guard applyAffectedStores else { return } do { try self.applyAffectedStoresForFetchedRequest(fetchRequest, context: context) } catch let error as CoreStoreError { CoreStore.log( error, "Attempted to perform a fetch but could not find any persistent store for the entity \(cs_typeName(fetchRequest.entityName))" ) throw error } catch { throw error } } ``` Could you help me out? Thanks~~

adam added the question label 2025-12-29 15:27:50 +01:00

adam closed this issue 2025-12-29 15:27:50 +01:00

adam commented 2025-12-29 15:27:51 +01:00

Author

Owner

Copy Link

Copy Source

@JohnEstropia commented on GitHub (Apr 12, 2019):

For unit tests you'll need to pass in the Bundle for the unit test module as CoreStore doesn't know where to load it from (There is no Bundle.main)

        let dataStack: DataStack = {
            let dataStack = DataStack(
                xcodeModelName: "Model",
                bundle: Bundle(for: type(of: self)) // or whatever Bundle your xcdatamodeld file is in
            )
            do {
                try dataStack.addStorageAndWait(InMemoryStore())
            } catch let error {
                XCTFail("Cannot set up database storage: \(error)")
            }
            return dataStack
        }()

@JohnEstropia commented on GitHub (Apr 12, 2019): For unit tests you'll need to pass in the `Bundle` for the unit test module as CoreStore doesn't know where to load it from (There is no `Bundle.main`) ```swift let dataStack: DataStack = { let dataStack = DataStack( xcodeModelName: "Model", bundle: Bundle(for: type(of: self)) // or whatever Bundle your xcdatamodeld file is in ) do { try dataStack.addStorageAndWait(InMemoryStore()) } catch let error { XCTFail("Cannot set up database storage: \(error)") } return dataStack }() ```

adam commented 2025-12-29 15:27:52 +01:00

Author

Owner

Copy Link

Copy Source

@jshl8612 commented on GitHub (Apr 12, 2019):

For unit tests you'll need to pass in the Bundle for the unit test module as CoreStore doesn't know where to load it from (There is no Bundle.main)

        let dataStack: DataStack = {
            let dataStack = DataStack(
                xcodeModelName: "Model",
                bundle: Bundle(for: type(of: self)) // or whatever Bundle your xcdatamodeld file is in
            )
            do {
                try dataStack.addStorageAndWait(InMemoryStore())
            } catch let error {
                XCTFail("Cannot set up database storage: \(error)")
            }
            return dataStack
        }()

Thanks for your answer, the issue is solved~

@jshl8612 commented on GitHub (Apr 12, 2019): > For unit tests you'll need to pass in the `Bundle` for the unit test module as CoreStore doesn't know where to load it from (There is no `Bundle.main`) > > ```swift > let dataStack: DataStack = { > let dataStack = DataStack( > xcodeModelName: "Model", > bundle: Bundle(for: type(of: self)) // or whatever Bundle your xcdatamodeld file is in > ) > do { > try dataStack.addStorageAndWait(InMemoryStore()) > } catch let error { > XCTFail("Cannot set up database storage: \(error)") > } > return dataStack > }() > ``` Thanks for your answer, the issue is solved~

Sign in to join this conversation.

No Branch/Tag Specified

Branches Tags

develop

prototype/swift6

master

prototype/concurrency

minIOS13

prototype/containers

transactionSourceTracking

prototype/swiftui

minIOS11

swift5_3

prototype/propertyWrapperFields

prototype/propertyWrappers

prototype/propertyWrapper

Swift5

throwables

prototype/Swift_4_1

prototype/Swift_4_0

prototype/Swift_3_2

prototype/queryBuilders

temp/develop

corestore4_develop

prototype/mainContextToPSC

master_ios_7_to_9

swift_2_3

gh-pages

_corespotlight-test

9.3.0

9.2.0

9.1.0

9.0.0

8.1.0

8.0.1

8.0.0

7.3.1

7.3.0

7.2.0

7.1.0

7.0.4

7.0.3

7.0.2

7.0.1

7.0.0

6.3.2

6.3.1

6.3.0

6.2.1

6.2.0

6.1.0

6.0.0

5.3.1

5.3.0

5.2.0

5.1.1

5.1.0

5.0.0

4.2.4

4.2.3

4.2.2

4.2.1

4.2.0

4.1.4

4.1.3

4.1.1

4.1.0

4.0.5

4.0.4

4.0.3

4.0.2

4.0.1

4.0.0

4.0.0-beta3

4.0.0-beta2

4.0.0-beta

3.1.1

3.1.0

3.0.3

3.0.2

3.0.1

3.0.0

2.1.3

2.1.2

2.1.1

2.1.0

2.0.6

2.0.5

2.0.4

2.0.3

2.0.2

2.0.1

2.0.0

1.6.10

1.6.9

1.6.8

1.6.7

1.6.6

1.6.5

1.6.4

1.6.3

1.6.2

1.6.1

1.6.0

1.5.4

1.5.3

1.5.2

1.5.1

1.5.0

1.4.4

1.4.3

1.4.2

1.4.1

1.4.0

1.3.6

1.3.5

1.3.4

1.3.3

1.3.2

1.3.1

1.3.0

1.2.1

1.2.0

1.0.2

1.0.1

1.0.0

0.2.1

0.2.0

0.1.2

0.1.1

0.1.0

Labels

Clear labels

abandoned

corestore bug

discussion

duplicate

enhancement

fixed

fixed

help wanted

in progress

investigating

ios/compiler bug

irreproducible

looking for workarounds

not a bug

pending

pending docs update

pull-request

Mirrored from GitHub Pull Request

question

regression

user bug

wontfix

No labels question

Milestone

No items

No Milestone

Projects

Clear projects

No projects

Assignees

Clear assignees

adam (Adam Melkus)

No Assignees

1 Participants

Notifications

Subscribe

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: starred/CoreStore#263