def test_invalidNames(self):
        """
        Passing a name which isn't a fully-qualified Python name to L{namedAny}
        should result in one of the following exceptions:
         - L{InvalidName}: the name is not a dot-separated list of Python
           objects
         - L{ObjectNotFound}: the object doesn't exist
         - L{ModuleNotFound}: the object doesn't exist and there is only one
           component in the name
        """
        err = self.assertRaises(reflect.ModuleNotFound, reflect.namedAny,
                                'nosuchmoduleintheworld')
        self.assertEqual(str(err), "No module named 'nosuchmoduleintheworld'")

        # This is a dot-separated list, but it isn't valid!
        err = self.assertRaises(reflect.ObjectNotFound, reflect.namedAny,
                                "@#$@(#.!@(#!@#")
        self.assertEqual(str(err), "'@#$@(#.!@(#!@#' does not name an object")

        err = self.assertRaises(reflect.ObjectNotFound, reflect.namedAny,
                                "tcelfer.nohtyp.detsiwt")
        self.assertEqual(
            str(err),
            "'tcelfer.nohtyp.detsiwt' does not name an object")

        err = self.assertRaises(reflect.InvalidName, reflect.namedAny, '')
        self.assertEqual(str(err), 'Empty module name')

        for invalidName in ['.twisted', 'twisted.', 'twisted..python']:
            err = self.assertRaises(
                reflect.InvalidName, reflect.namedAny, invalidName)
            self.assertEqual(
                str(err),
                "name must be a string giving a '.'-separated list of Python "
                "identifiers, not %r" % (invalidName,))

        Passing a name which isn't a fully-qualified Python name to L{namedAny}
        should result in one of the following exceptions:
         - L{InvalidName}: the name is not a dot-separated list of Python
           objects
         - L{ObjectNotFound}: the object doesn't exist
         - L{ModuleNotFound}: the object doesn't exist and there is only one
           component in the name
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_reflect.py