def test_remove_all_in_between_empty(self):
dl_list = DoublyLinkedList([1, 2, 3])
self.assertEqual(len([i for i in dl_list.items()]), 3)
new_list = dl_list.removeAllInBetween(\
dl_list.firstnode(), dl_list.firstnode().next())
self.assertEqual(len([i for i in dl_list.items()]), 3)
self.assertEqual(len([i for i in new_list.items()]), 0)
self.assertEqual(new_list.firstnode(), None)
def test_remove_all_in_between_single_item(self):
dl_list = DoublyLinkedList([1, 2, 3, 4, 5, 6])
self.assertEqual(len([i for i in dl_list.items()]), 6)
new_list = dl_list.removeAllInBetween(\
dl_list.firstnode(), dl_list.firstnode().next().next())
self.assertEqual(len([i for i in dl_list.items()]), 5)
self.assertEqual(len([i for i in new_list.items()]), 1)
self.assertEqual(new_list.firstnode().value, 2)
