In unit test, execute the block passed in queue with dispatch_asyc

Question

If I dispatch_async a block on main queue like this:

-(void) myTask {
  dispatch_async(dispatch_get_main_queue(), ^{
      [self.se         


        

Answer 1

For execute test in async block use XCTestExpectation class

-(void) myTask2 {
  XCTestExpectation *expectation = [self expectationWithDescription:@"catch is called"];
  dispatch_async(dispatch_queue_create("my.sequetial.queue", NULL), ^{
      [self.serviceClient fetchDataForUserId:self.userId];
      [expectation fulfill];
   });

   [self waitForExpectationsWithTimeout:Timeout handler:^(NSError *error) {
        //check that your NSError nil or not
    }];
}

Hope this help

Answer 2

You could create the queue in your test function.

-(void) myTask2:(dispatch_queue_t*)queue {
    dispatch_async(*queue, ^{
        [self.service fetchData];
    });
}

-(void)testMyTask2{
    dispatch_queue_t queue = dispatch_queue_create("my.sequential.queue", NULL);
    [myObj myTask2:&queue];

    dispatch_sync(queue, ^{
    });
}

(Just realised currentRunLoop is not needed)