I apologize in advance that this probably will not ultimately make a big contribution to the general knowledge base, but I am looking for help in diagnosing what is probably related to the supervision of the configuration, due to which single instances are repeated tests.
I configured using RestKit with an object storage in memory during unit testing, so after each test case I can reset to store my persistent stores, and each test can work with a fresh database. In most cases, my test suite works without problems, but often enough to be a transaction breaker. There was a failure due to which [I think] overfulfilled the context of the managed entity. All relevant accident codes and data are below:
Unit Test Setting the base class
@implementation MyTestCase
- (void)setUp
{
[super setUp];
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
[[MyObjectManager sharedManager] start];
});
}
- (void)tearDown
{
[super tearDown];
[[MyObjectManager sharedManager] reset];
}
Relevant MyObjectManager Setting
@interface MyObjectManager : RKObjectManager
- (void)start
{
RKManagedObjectStore *managedObjectStore = [[RKManagedObjectStore alloc] initWithPersistentStoreCoordinator:[self persistentStoreCoordinator]];
self.managedObjectStore = managedObjectStore;
[managedObjectStore createManagedObjectContexts];
[RKManagedObjectStore setDefaultStore:managedObjectStore];
}
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (_persistentStoreCoordinator != nil)
{
return _persistentStoreCoordinator;
}
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:kRDPersistentStore];
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
NSDictionary *options = @{
NSSQLitePragmasOption : @{
@"synchronous" : @"FULL",
@"fullfsync" : @(1)
},
NSMigratePersistentStoresAutomaticallyOption : @YES,
NSInferMappingModelAutomaticallyOption : @YES
};
NSError *error = nil;
if (![self persistentStoreAtPath:storeURL options:options error:error])
{
NSLog(@"Error adding store %@: %@, %@", storeURL, error, [error userInfo]);
}
return _persistentStoreCoordinator;
}
- (NSPersistentStore *)persistentStoreAtPath:(NSURL *)storeURL options:(NSDictionary *)options error:(NSError *)error
{
return [_persistentStoreCoordinator addPersistentStoreWithType:NSInMemoryStoreType
configuration:nil
URL:nil
options:options
error:&error];
}
MyObjectManager :: reset Implementation
- (void)reset
{
[[RKObjectManager sharedManager].operationQueue cancelAllOperations];
NSError *error = nil;
[[RKManagedObjectStore defaultStore] resetPersistentStores:&error];
if (error)
{
NSLog(@"Error! : %@", error);
}
[[NSURLCache sharedURLCache] removeAllCachedResponses];
}
Typical Failure Report
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGSEGV)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
iPhone Simulator 463.9.41, iPhone OS 7.1 (iPhone Retina (4-inch)/11D167)
The main thread rotates the execution loop, waiting for an asynchronous test case: (Not always, but most of our tests use this method)
Thread : com.apple.main-thread
0 libsystem_kernel.dylib 0x047f6f92 semaphore_signal_trap + 10
1 libdispatch.dylib 0x0447f41f _dispatch_barrier_sync_f_slow_invoke + 54
2 libdispatch.dylib 0x044904d0 _dispatch_client_callout + 14
3 libdispatch.dylib 0x0447e726 _dispatch_main_queue_callback_4CF + 340
4 CoreFoundation 0x040fb43e __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 14
5 CoreFoundation 0x0403c5cb __CFRunLoopRun + 1963
6 CoreFoundation 0x0403b9d3 CFRunLoopRunSpecific + 467
7 CoreFoundation 0x0403b7eb CFRunLoopRunInMode + 123
8 Foundation 0x03a71e35 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 284
9 Foundation 0x03a71cd5 -[NSRunLoop(NSRunLoop) runUntilDate:] + 88
10 Remind101-Tests 0x0cbb2c02 -[UTTestCase waitForBlockWithTimeout:] + 233
11 Remind101-Tests 0x0cbb2b14 -[UTTestCase waitForBlock] + 49
12 Remind101-Tests 0x0cbba55e -[UTAPITestCase sendRequestExpectingSuccess:] + 142
13 Remind101-Tests 0x0cb92832 -[UTMessageRequestTests testRequestCreatesFileEntities] + 166
14 CoreFoundation 0x0408a91d __invoking___ + 29
15 CoreFoundation 0x0408a82a -[NSInvocation invoke] + 362
16 XCTest 0x20103c6c -[XCTestCase invokeTest] + 221
17 XCTest 0x20103d7b -[XCTestCase performTest:] + 111
18 otest-shim-ios.dylib 0x0098fcc7 XCPerformTestWithSuppressedExpectedAssertionFailures + 172
19 otest-shim-ios.dylib 0x0098fc15 XCTestCase_performTest + 31
20 XCTest 0x20104c48 -[XCTest run] + 82
21 XCTest 0x201033e8 -[XCTestSuite performTest:] + 139
22 XCTest 0x20104c48 -[XCTest run] + 82
23 XCTest 0x201033e8 -[XCTestSuite performTest:] + 139
24 XCTest 0x20104c48 -[XCTest run] + 82
25 XCTest 0x201033e8 -[XCTestSuite performTest:] + 139
26 XCTest 0x20104c48 -[XCTest run] + 82
27 XCTest 0x201066ba +[XCTestProbe runTests:] + 183
28 Foundation 0x03a4b5ec __NSFireDelayedPerform + 372
29 CoreFoundation 0x04054ac6 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 22
30 CoreFoundation 0x040544ad __CFRunLoopDoTimer + 1181
31 CoreFoundation 0x0403c538 __CFRunLoopRun + 1816
32 CoreFoundation 0x0403b9d3 CFRunLoopRunSpecific + 467
33 CoreFoundation 0x0403b7eb CFRunLoopRunInMode + 123
34 GraphicsServices 0x057495ee GSEventRunModal + 192
35 GraphicsServices 0x0574942b GSEventRun + 104
36 UIKit 0x01e7ff9b UIApplicationMain + 1225
37 Remind101 0x0008d184 main (main.m:16)
38 libdyld.dylib 0x046c5701 start + 1
NSManagedObjectContext stream failed:
Thread : Crashed: NSManagedObjectContext Queue
0 libobjc.A.dylib 0x03e250be objc_msgSend + 26
1 CoreData 0x0108ffe3 developerSubmittedBlockToNSManagedObjectContextPerform_privateasync + 83
2 libdispatch.dylib 0x044904d0 _dispatch_client_callout + 14
3 libdispatch.dylib 0x0447e047 _dispatch_queue_drain + 452
4 libdispatch.dylib 0x0447de42 _dispatch_queue_invoke + 128
5 libdispatch.dylib 0x0447ede2 _dispatch_root_queue_drain + 78
6 libdispatch.dylib 0x0447f127 _dispatch_worker_thread2 + 39
7 libsystem_pthread.dylib 0x047bfdab _pthread_wqthread + 336
8 libsystem_pthread.dylib 0x047c3cce start_wqthread + 30
, developerSubmittedBlockToNSManagedObjectContextPerform_privateasync objc_msgSend.
, - MyObjectManager.managedObjectContext , , , . , , , , .
NSManagedObjectContext::performBlock RestKit, , , , . , , . performBlockAndWait, , .
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