test_client.py 文件源码

def test_get_environment_variable_file_error(self):
        nonexistent_file = datafile('nonexistent')
        os.environ[client.GOOGLE_APPLICATION_CREDENTIALS] = nonexistent_file
        expected_err_msg = (
            'File {0} \(pointed by {1} environment variable\) does not '
            'exist!'.format(
                nonexistent_file, client.GOOGLE_APPLICATION_CREDENTIALS))
        with self.assertRaisesRegexp(client.ApplicationDefaultCredentialsError,
                                     expected_err_msg):
            client._get_environment_variable_file()