locks_test.py 文件源码

def test_context_manager_timeout_error(self):
        sem = locks.Semaphore(value=0)
        with self.assertRaises(gen.TimeoutError):
            with (yield sem.acquire(timedelta(seconds=0.01))):
                pass

        # Counter is still 0.
        self.assertFalse(sem.acquire().done())