def test_subunitPlugin(self):
        """
        One of the reporter plugins is the subunit reporter plugin.
        """
        subunitPlugin = self.getPluginsByLongOption('subunit')
        self.assertEqual('Subunit Reporter', subunitPlugin.name)
        self.assertEqual('twisted.trial.reporter', subunitPlugin.module)
        self.assertEqual('subunit', subunitPlugin.longOpt)
        self.assertIdentical(None, subunitPlugin.shortOpt)
        self.assertEqual('SubunitReporter', subunitPlugin.klass)

        One of the reporter plugins is the subunit reporter plugin.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/trial/test/test_plugins.py