def test_insert_last_node_empty_list(self):
dl_list = DoublyLinkedList()
self.assertEqual(len([i for i in dl_list.items()]), 0)
dl_list.insertLastNode(1)
self.assertEqual(dl_list.lastnode().value, 1)
self.assertEqual(len([i for i in dl_list.items()]), 1)
def test_insert_last_node(self):
dl_list = DoublyLinkedList([1, 2, 3])
self.assertEqual(len([i for i in dl_list.items()]), 3)
dl_list.insertLastNode(4)
self.assertEqual(dl_list.lastnode().value, 4)
self.assertEqual(len([i for i in dl_list.items()]), 4)
