def test_update(self):
mylist = SinglyLinkedList(1).append(2).append(3).append(4)
newList = mylist.update(2, 7)
self.assertEqual(mylist, [1, 2, 3, 4])
self.assertEqual(newList, [1, 7, 3, 4])
def test_update(self):
mylist = SinglyLinkedList(1).append(2).append(3).append(4)
newList = mylist.update(2, 7)
self.assertEqual(mylist, [1, 2, 3, 4])
self.assertEqual(newList, [1, 7, 3, 4])
