test_power_control.py 文件源码

def wait_for_assert(self, lambda_expression, timeout=TEST_TIMEOUT):
        """
        Evaluates lambda_expression once/1s until no AssertionError or hits
        timeout.
        """
        import time
        import inspect

        running_time = 0
        while running_time < timeout:
            try:
                lambda_expression()
            except AssertionError:
                pass
            else:
                break
            time.sleep(1)
            running_time += 1
        self.assertLess(running_time, timeout, "Timed out waiting for %s." % inspect.getsource(lambda_expression))