def test_join():
list = SingleLinkedList()
list2 = SingleLinkedList()
list.join(list2)
assert list.isEmpty()
list.prepend(1).prepend(2).prepend(3)
list2.prepend(4).prepend(5).prepend(6)
list.join(list2)
assert list.head() == 6
assert list.size() == 6
def test_remove_last():
list = SingleLinkedList()
list.removeLast()
assert list.isEmpty()
list.append(1).removeLast()
assert list.isEmpty()
list.prepend(3).prepend(2).prepend(1)
assert list.size() == 3
list.removeLast()
assert list.head() == 1
assert list.size() == 2
list.removeLast().removeLast().removeLast()
assert list.size() == 0
class Stack:
def __init__(self):
self.__list = SingleLinkedList()
def isEmpty(self):
return self.__list.isEmpty()
def size(self):
return self.__list.size()
def top(self):
return self.__list.head()
def push(self, element):
self.__list.prepend(element)
return self
def pop(self):
element = self.top()
self.__list = self.__list.tail()
return element
def test_prepend_list():
list = SingleLinkedList()
assert list.head() is None
list.prepend(1).prepend(2).prepend(3)
assert list.head() == 3
def test_append():
list = SingleLinkedList()
list.append(1)
assert list.head() == 1
list.append(2).append(3)
assert list.head() == 1