Asynchronous tests cases timeout instantly when attempting to access torn down singeltons in another test

[Ashik Manandhar]

I'm running into this issue where random asynchronous test cases will timeout instantly if another test attempts to access a torn down singleton while tearing down.

For example

MySingelton :

__strong MySingelton *sharedInstance = nil;

+ (MySingelton *)sharedInstance {

   return sharedInstance;

}

+ (void)setSharedInstance:(MySingleton *)sharedSingelton {

   sharedInstance = sharedSingleton;

}

Test 1:

- (void)setUp {

    [super setUp];

    [MySingleton setShareInstance:[[MySingelton alloc] init]];

}

- (void)tearDown {

    [MySingleton setSharedInstance:nil];

    NSLog(@"%@", [MySingleton sharedInstance]);

}

Test 2:

- (void)testAsync {

   [self prepare];

   [self performSelector:@selector(_confirmAsync) withObject:nil afterDelay:0.1];

   [self waitForStatus:kGHUnitWaitStatusSuccess timeout:1];

}

- (void)_confirmAsync {

   [self notify:kGHUnitWaitStatusSuccess forSelector:@selector(testAsync)];

}

In this example, the waitForStatus:timeout: in Test 2 will timeout instantly without ever making the call to _confirmAsync. Any ideas? Thanks!