I was using SenTestingKit, the default unit testing framework from Apple, when I found out that it does not support tests that involve asynchronous methods, or blocks.

That's a waste.

Though there is a workaround using semaphore.

- (void)testBlockMethod {
dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
// Your block method eg. AFNetworking
NSURL *url = [NSURL URLWithString:@""];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSLog(@"IP Address: %@", [JSON valueForKeyPath:@"origin"]);
STAssertNotNil(JSON, @"JSON not loaded");
// Signal that block has completed
} failure:nil];
[operation start];
// Run loop
while (dispatch_semaphore_wait(semaphore, DISPATCH_TIME_NOW))
[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
beforeDate:[NSDate dateWithTimeIntervalSinceNow:10]];

But if you mind, there are lots of other testing frameworks, eg GHUnit supports asynchronous testing.




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