def test_has_keys_values_and_items(self):
d = PermaDict({'a': 'b', 'c': 'd'})
self.assertEqual(set(d.keys()), {'a', 'c'})
self.assertEqual(set(d.values()), {'b', 'd'})
self.assertEqual(set(d.items()), {('a', 'b'), ('c', 'd')})
def test_has_keys_values_and_items(self):
d = PermaDict({"a": "b", "c": "d"})
self.assertEqual(set(d.keys()), {"a", "c"})
self.assertEqual(set(d.values()), {"b", "d"})
self.assertEqual(set(d.items()), {("a", "b"), ("c", "d")})
