def test_items(self):
ll = LinkedList()
assert ll.items() == []
ll.append('B')
assert ll.items() == ['B']
ll.prepend('A')
assert ll.items() == ['A', 'B']
ll.append('C')
assert ll.items() == ['A', 'B', 'C']
def test_items_after_prepend(self):
ll = LinkedList()
assert ll.items() == []
# Prepend should add new item to head of list
ll.prepend('C')
assert ll.items() == ['C']
ll.prepend('B')
assert ll.items() == ['B', 'C']
ll.prepend('A')
assert ll.items() == ['A', 'B', 'C']
def test_items_after_append(self):
ll = LinkedList()
assert ll.items() == []
# Append should add new item to tail of list
ll.append('A')
assert ll.items() == ['A']
ll.append('B')
assert ll.items() == ['A', 'B']
ll.append('C')
assert ll.items() == ['A', 'B', 'C']