def test_subCommandsIncludeWeb(self):
        """
        L{TwistOptions.subCommands} includes a sub-command for every plug-in.
        """
        options = TwistOptions()

        plugins = set(options.plugins)
        subCommands = set(
            name for name, shortcut, parser, doc in options.subCommands
        )

        self.assertEqual(subCommands, plugins)

        L{TwistOptions.subCommands} includes a sub-command for every plug-in.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/application/twist/test/test_options.py