def test_unknownTypeMissing(self):
        """
        Requesting a record of unknown type where other records exist for the
        name in question results in an empty answer set.
        """
        unknownType = max(common.typeToMethod) + 1
        answer, authority, additional = self.successResultOf(
            my_domain_com.query(
                Query(name=u'my-domain.com', type=unknownType)))
        self.assertEqual(answer, [])

        Requesting a record of unknown type where other records exist for the
        name in question results in an empty answer set.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_names.py