test_client.py 文件源码

def test_from_stream_missing_file(self):
        credentials_filename = None
        expected_err_msg = (r'The parameter passed to the from_stream\(\) '
                            r'method should point to a file.')
        with self.assertRaisesRegexp(client.ApplicationDefaultCredentialsError,
                                     expected_err_msg):
            self.get_a_google_credentials_object().from_stream(
                credentials_filename)