Open Radar

 
Summary:
There are two models - MainEntity and SecondEntity, MainEntity objects contain property otherValues which is to-many to SecondEntity. When I run the application on simulator, I see both Objective-C and Swift return objects of SecondEntity when fetching the otherValue. But in tests otherValues contains objects of SecondEntity_SecondEntity_2 so I can't cast result to SecondEntity which leads to failed tests.

Steps to Reproduce:
1. Open the attached project
2. Run the SwiftTestBug target
3. See two lines in a console:
    'The object is really a SecondEntity: SecondEntity'
    'Expected result: other values are objects of type SecondEntity'
    First one is from Objective-C side and the second one is from Swift side. Both mean that type of returned object is correct.
4. Switch target to 'SwiftTestBug Tests'
5. Run tests
6. See test failed with result: 'The object is expected to be a SecondEntity, not just generic NSManagedObject. Actually it is SecondEntity_SecondEntity_2'.

Expected Results:
Test should not be failed and CoreData in tests should return the results of type SecondEntity.

Actual Results:
Test failed because CoreData returned result of type 'SecondEntity_SecondEntity_2'

Version:
iOS 8.1.3, iOS 8.2, iOS 8.3 beta 3

Configuration:
iOS Simulator