def test_appendleft_many():
dll = DoubleLinkedList()
dll.appendleft(1)
dll.appendleft(2)
dll.appendleft(3)
dll.appendleft(4)
nose.tools.assert_equal(dll.pop(), 1)
def test_appendleft_full():
dll = DoubleLinkedList(range(3))
dll.appendleft(5)
nose.tools.assert_equal(dll.pop(), 2)
def test_append_twice_pop_twice():
dll = DoubleLinkedList()
dll.append(1)
dll.append(2)
dll.pop()
assert dll.pop() == 1
def test_pop():
dll = DoubleLinkedList()
dll.append(1)
assert dll.pop() == 1
