def test_cancellation_behavior(): """ If a request is cancelled while it was waiting on a lock, it should raise the CancellationException. """ lock = RequestLock() lock.acquire() def f(): try: with lock: assert False except Request.CancellationException: pass else: assert False finished = [False] cancelled = [False] failed = [False] def handle_finished(result): finished[0] = True def handle_cancelled(): cancelled[0] = True def handle_failed(*args): failed[0] = True req = Request(f) req.notify_finished(handle_finished) req.notify_failed(handle_failed) req.notify_cancelled(handle_cancelled) req.submit() req.cancel() time.sleep(0.1) lock.release() time.sleep(0.1) assert not finished[0] and not failed[0] and cancelled[0]