test_client.py 文件源码

def test_raise_exception_for_missing_fields(self):
        missing_fields = ['first', 'second', 'third']
        expected_err_msg = ('The following field\(s\) must be defined: ' +
                            ', '.join(missing_fields))
        with self.assertRaisesRegexp(client.ApplicationDefaultCredentialsError,
                                     expected_err_msg):
            client._raise_exception_for_missing_fields(missing_fields)