Class Foobar1

test/sql/test_compare.py:1426–1434

    def test_cache_key_unknown_traverse(self):
        class Foobar1(ClauseElement):
            _traverse_internals = [
                ("key", InternalTraversal.dp_anon_name),
                ("type_", InternalTraversal.dp_unknown_structure),
            ]

            def __init__(self, key, type_):
                self.key = key
                self.type_ = type_

        f1 = Foobar1("foo", String())
        eq_(f1._generate_cache_key(), None)