def test_zip():
lista = LinkedList()
listb = LinkedList()
lista.append_item('A')
lista.append_item('B')
listb.append_item('1')
listb.append_item('2')
answer = lista.zip_list(listb)
actual = answer.find_all()
expected = ['A', '1', 'B', '2']
assert actual == expected
def test_x_fromend0():
list = LinkedList()
list.append_item('rock')
list.append_item('paper')
list.append_item('scissors')
list.append_item('machinegun')
actual = list.x_fromend(0)
expected = 'machinegun'
assert actual == expected
def test_add_after_value1():
list = LinkedList()
list.append_item('rock')
list.append_item('paper')
list.append_item('scissors')
list.append_item('machinegun')
list.inject_a('scissors', 'cannon')
actual = list.find_all()
expected = ['rock', 'paper', 'scissors', 'cannon', 'machinegun']
assert actual == expected
def test_append_end():
list = LinkedList()
list.append_item('rock')
list.append_item('paper')
list.append_item('scissors')
actual = list.head.data
expected = "rock"
assert actual == expected
def test_x_fromend_neg():
list = LinkedList()
list.append_item('machinegun')
actual = list.x_fromend(-2)
expected = 'Exception'
assert actual == expected
def test_x_fromend_one_item():
list = LinkedList()
list.append_item('machinegun')
actual = list.x_fromend(0)
expected = 'machinegun'
assert actual == expected