def test_remove_node_last_item(self):
dl_list = DoublyLinkedList([1, 2, 3])
self.assertEqual(len([i for i in dl_list.items()]), 3)
dl_list.removeNode(dl_list.lastnode())
self.assertEqual(dl_list.lastnode().value, 2)
self.assertEqual(len([i for i in dl_list.items()]), 2)
def test_remove_node_unique_item(self):
dl_list = DoublyLinkedList([1])
self.assertEqual(len([i for i in dl_list.items()]), 1)
dl_list.removeNode(dl_list.firstnode())
self.assertEqual(dl_list.firstnode(), None)
self.assertEqual(len([i for i in dl_list.items()]), 0)
