def test_remove_before(self): dl_list = DoublyLinkedList([1, 2, 3]) self.assertEqual(len([i for i in dl_list.items()]), 3) dl_list.removeBeforeNode(dl_list.lastnode()) self.assertEqual(dl_list.lastnode().prev().value, 1) self.assertEqual(len([i for i in dl_list.items()]), 2)
def test_remove_before_first_item(self): dl_list = DoublyLinkedList([1, 2, 3]) with self.assertRaises(DoublyLinkedListError): dl_list.removeBeforeNode(dl_list.firstnode())