I am developing unit tests for my application using restkit (0.24.1) integrated using cocoapods:
pod "RestKit/Testing", "~> 0.24.1"
pod "RestKit", "~> 0.24.1"
I am getting a error message saying that the managedObjectContext is nil. I beg to differ because I already have lots of unit tests using the same object context and they all seem to work... :/
Restkit setup:
lazy var persistentStoreCoordinator: RKManagedObjectStore? = {
var coordinator = RKManagedObjectStore(managedObjectModel: self.managedObjectModel)
self.objectManager!.managedObjectStore = coordinator
coordinator.createPersistentStoreCoordinator()
var storePath: NSString = RKApplicationDataDirectory().stringByAppendingPathComponent(self.storeFilename)
var e: NSError?
coordinator.addSQLitePersistentStoreAtPath(storePath as String, fromSeedDatabaseAtPath: nil, withConfiguration: nil,
options: [
NSInferMappingModelAutomaticallyOption: true,
NSMigratePersistentStoresAutomaticallyOption: true
], error: &e)
if(e != nil){
var error: NSError? = nil
coordinator = nil
// Report any error we got.
let dict = NSMutableDictionary()
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = "There was an error creating or loading the application's saved data."
dict[NSUnderlyingErrorKey] = error
error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict as [NSObject : AnyObject])
Logger.Error("Serious error \(error), \(error!.userInfo)")
abort()
}
coordinator.createManagedObjectContexts()
coordinator.managedObjectCache = RKInMemoryManagedObjectCache(managedObjectContext: coordinator.persistentStoreManagedObjectContext)
return coordinator
}()
The unit test:
class TestRestMappers: XCTestCase {
let rootEndpoint = RootEndpoint()
override func setUp() {
super.setUp()
let testTargetBundle = NSBundle(identifier: "anita-borg.malaria-iosTests")
RKTestFixture.setFixtureBundle(testTargetBundle)
}
func testRootEndpointMapper() {
let parsedJson: AnyObject? = RKTestFixture.parsedObjectWithContentsOfFixture("api.json")
let mapping = rootEndpoint.mapping
let test = RKMappingTest(forMapping: mapping, sourceObject: parsedJson, destinationObject: nil)
test.addExpectation(RKPropertyMappingTestExpectation(sourceKeyPath: "users", destinationKeyPath: "users"))
XCTAssertTrue(test.evaluate)
}
}
The error message I get from the console is:
*** Assertion failure in -[RKMappingTest dataSourceForMappingOperation:], (...): error:
-[malaria_iosTests.TestRestMappers testRootEndpointMapper] : XCTAssertTrue failed: throwing "Cannot test an `RKEntityMapping` with a nil managed object context." -
Test Case '-[malaria_iosTests.TestRestMappers testRootEndpointMapper]' failed (0.010 seconds).
A snippet of the mapping where I connect the store:
let managedObjectStore: RKManagedObjectStore = CoreDataStore.sharedInstance.persistentStoreCoordinator!
let rootMap = RKEntityMapping(forEntityForName: name, inManagedObjectStore: managedObjectStore)
I already searched in many places the source of the problem and I can't seem to find a solution.
Thank you in advance
edit:
NSManagedObjectContext:
lazy var backgroundContext: NSManagedObjectContext? = {
let coordinator = self.store.persistentStoreCoordinator?.persistentStoreCoordinator
if coordinator == nil {
return nil
}
var backgroundContext = NSManagedObjectContext(concurrencyType: NSManagedObjectContextConcurrencyType.PrivateQueueConcurrencyType)
backgroundContext.persistentStoreCoordinator = coordinator
return backgroundContext
}()
Tests require configuration. Generally you should assume that if you don't explicitly give a test some information then it doesn't have any information. So, you need to give the test a context to work with (and potentially a data source in your specific case).