def test_searchEmptyArgument(self):
        """
        L{client.Resolver.parseConfig} treats a I{search} line without an
        argument as indicating an empty search suffix.
        """
        resolver = client.Resolver(servers=[("127.0.0.1", 53)])
        resolver.parseConfig([b"search\n"])
        self.assertEqual([], resolver.search)

        L{client.Resolver.parseConfig} treats a I{search} line without an
        argument as indicating an empty search suffix.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_client.py