def test_insert_filled_index_last(self):
linkedlist = CircularLinkedList([1, 2, 3, 4, 5])
linkedlist.insert(4, 99)
assert linkedlist[4] == 99
assert len(linkedlist) == 6
def test_insert_from_empty(self):
linkedlist = CircularLinkedList()
with pytest.raises(IndexError):
linkedlist.insert(0, 0)