test_config.py 文件源码

def test_open_and_close(self):
        # ConfigurationFile.open() returns a context manager.
        config_file = os.path.join(self.make_dir(), "config")
        config_ctx = ConfigurationFile.open(config_file)
        self.assertIsInstance(config_ctx, contextlib._GeneratorContextManager)
        with config_ctx as config:
            self.assertIsInstance(config, ConfigurationFile)
            self.assertThat(config_file, FileExists())
            self.assertEqual({}, config.config)
            self.assertFalse(config.dirty)
        self.assertThat(config_file, FileContains(""))