def test_append():
linked_list = SinglyLinkedList()
linked_list.append(4)
linked_list.append(5)
assert linked_list.size() == 2
assert linked_list.get(0) == 4
assert linked_list.get(1) == 5
def test_insert_empty():
linked_list = SinglyLinkedList()
linked_list.insert(3, 0)
assert linked_list.size() == 1
assert linked_list.get(0) == 3
def test_append_empty():
linked_list = SinglyLinkedList()
linked_list.append(1)
assert linked_list.size() == 1
assert linked_list.get(0) == 1