text: # # from linked_list import Node, LinkedList
  
  # def test_instance():
  #     ll = LinkedList
  #     assert ll.head == None
  
  # def test_insert_empty():
  #     ll = LinkedList()
  #     ll.insert("apples")
  #     assert ll.head.value == "apples"
  
  # def test_insert_full():
  #     ll = LinkedList()
  #     ll.insert("apples")
  #     ll.insert("bananas")
  #     assert ll.head.value == "bananas"
  #     assert ll.head.next.value == "appples"
  
  # def test_str():
  #     ll = LinkedList()
  #     ll.insert("apples")
  #     ll.insert("bananas")
  #     assert str(ll) == "{ bananas } -> { apples } -> NULL"
  
  # def test_kth_method():
  #     ll = LinkedList()
  #     ll.insert(1)
  #     ll.append(2)
  #     ll.append(3)
  #     ll.append(4)
  #     ll.append(5)
  
  #     assert ll.kth_from_end(1) == 4
  