def test_search_for_item(self): linked_list = LinkedList("Bob") linked_list.insert_at_tail("Kim") linked_list.insert_at_tail("Jim") linked_list.insert_at_tail("Max") result = linked_list.search_for_item("Max") self.assertEqual(result, (3, "Max")) empty_result = linked_list.search_for_item("Adrian") self.assertIsNone(empty_result)