def test_insert_after_missing():
linked_list = LinkedList()
linked_list.insert("banana")
with pytest.raises(TargetError):
linked_list.insert_after("radish", "zucchinni")
def test_insert_after():
linked_list = LinkedList()
linked_list.insert("apple")
linked_list.insert("banana")
linked_list.insert_after("banana", "cucumber")
assert str(linked_list) == "{ banana } -> { cucumber } -> { apple } -> NULL"
def test_insert_after(self):
lst = LinkedList([82, 57, 16, 20, 21, 84, 99, 56, 100, 46])
node = lst.search(99)
lst.insert_after(node, 555)
node = lst.search(57)
lst.insert_after(node, 86)
self.assertEqual(list(lst),
[82, 57, 86, 16, 20, 21, 84, 99, 555, 56, 100, 46])
def main():
animals = LinkedList()
animals.insert_back("Dog")
animals.insert_back("Cat")
animals.insert_front("Horse")
animals.insert_after("Dog", "Giraffe")
animals.insert_front("Apple")
animals.display()
animals.remove("Apple")
animals.display()
print("List contains {} elements.".format(animals.size))
def test_insert_after_empty():
linked_list = LinkedList()
with pytest.raises(TargetError):
linked_list.insert_after("radish", "zucchinni")
