def test_pop():
ll = LinkedList()
ll.dump(5, 3, 1, 0)
assert ll.pop(0) == 5
assert ll.pop(2) == 0
assert ll.pop() == 1
def test_indexerror_pop():
ll = LinkedList()
ll.dump(5, 3, 1, 0)
with pytest.raises(IndexError):
ll.pop(234)