def test_scanp_cons():
# pylint: disable=missing-docstring
neutral = 0
slst = SList([1, 2, 3, 4])
res = slst.scanp(operator.add, neutral)
exp = SList([9, 7, 4, 0])
assert res == exp
def test_scanp_nil():
# pylint: disable=missing-docstring
neutral = 0
slst = SList()
res = slst.scanp(operator.add, neutral)
exp = SList([])
assert res == exp
