def test_retry(self, mock_exc_to_code, mock_time):
        mock_exc_to_code.side_effect = lambda e: e.code
        to_attempt = 3
        retry = RetryOptions(
            [_FAKE_STATUS_CODE_1],
            BackoffSettings(0, 0, 0, 0, 0, 0, 1))

        # Succeeds on the to_attempt'th call, and never again afterward
        mock_call = mock.Mock()
        mock_call.side_effect = ([CustomException('', _FAKE_STATUS_CODE_1)] *
                                 (to_attempt - 1) + [mock.DEFAULT])
        mock_call.return_value = 1729
        mock_time.return_value = 0
        settings = _CallSettings(timeout=0, retry=retry)
        my_callable = api_callable.create_api_call(mock_call, settings)
        self.assertEqual(my_callable(None), 1729)
        self.assertEqual(mock_call.call_count, to_attempt)