testing_test.py 文件源码

def test_timeout_environment_variable(self):
        @gen_test(timeout=0.5)
        def test_long_timeout(self):
            time = self.io_loop.time
            yield gen.Task(self.io_loop.add_timeout, time() + 0.25)

        # Uses provided timeout of 0.5 seconds, doesn't time out.
        with set_environ('ASYNC_TEST_TIMEOUT', '0.1'):
            test_long_timeout(self)

        self.finished = True