def test_get_link_values(self):
dll = DoubleLinkedList()
dll.add(12)
dll.add(99)
dll.add(37)
dll.add(66)
items_expected = [12, 99, 37, 66]
self.assertEqual(items_expected, dll.get_link_values())
self.assertEqual(4, dll.count_links())
def test_delete_reconnect(self):
dll = DoubleLinkedList()
dll.add(12)
dll.add(99)
dll.add(37)
dll.add(66)
dll.add(44)
dll.delete(37, reconnect=True)
self.assertEqual([12, 99, 66, 44], dll.traverse())
self.assertEqual([44, 66, 99, 12], dll.traverse_back())
self.assertEqual([12, 99, 66, 44], dll.get_link_values())
self.assertEqual(4, dll.count_links())