def test_add_after_value():
list = LinkedList()
list.insert('bumpers')
list.insert('baby')
list.insert('rubber')
list.inject_a('baby', 'buggy')
actual = list.find_all()
expected = ['rubber', 'baby', 'buggy', 'bumpers']
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