Call resume() to stop the block from exercising the run loop and break out of the loop/block. Failure to call resume() will cause the test to hang indefinitely. This is useful to testing asynchronous actions like AFNetworking operations. See https://gist.github.com/2215212 With some reference from https://github.com/icanzilb/MTTestSemaphore, I w…

gistfile1.m

typedef void (^LXSResumeBlock)(void);
typedef void (^LXSRunLoopBlock)(LXSResumeBlock resume);
// Call resume() to stop the block from exercising the run loop and break out of the loop/block.
// Failure to call resume() will cause the test to hang indefinitely.
// This is useful to testing asynchronous actions like AFNetworking operations. See https://gist.github.com/2215212
// With some reference from https://github.com/icanzilb/MTTestSemaphore, I was able to simplify this method.
inline void LXS_exercisesRunLoopInBlock(LXSRunLoopBlock block) {
    __block BOOL keepRunning = YES;
    block(^{ keepRunning = NO; });
    while (keepRunning && [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:0.03]]) {
    }
}


// The example...
- (void)testExercisesRunLoopInBlock {
    // The workaround with testRunLoopInBlock method...
    LXS_exercisesRunLoopInBlock(^(LXSResumeBlock resume) {
        AFHTTPClient *theHTTPClient = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:@"http://www.google.com/"]];
        [theHTTPClient
         getPath:@""
         parameters:nil
         success:^(AFHTTPRequestOperation *operation, id responseObject) {
             STAssertTrue(YES, @"This has pass...");
             resume();
         }
         failure:^(AFHTTPRequestOperation *operation, NSError *error) {
             STFail(@"This has fail...");
             resume();
         }];
    });
}