utility_testcase.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.
        """
        running_time = 0
        assertion = None
        while running_time < timeout:
            try:
                lambda_expression()
            except AssertionError, e:
                assertion = e
                logger.debug("%s tripped assertion: %s" % (inspect.getsource(lambda_expression), e))
            else:
                break
            time.sleep(1)
            running_time += 1
        self.assertLess(running_time,
                        timeout,
                        "Timed out waiting for %s\nAssertion %s" % (inspect.getsource(lambda_expression), assertion))