def test_grouper_fillvalue():
base = range(13)
blocks = [list(block) for block in grouper(base, 5, fillvalue=-1)]
assert len(blocks) == 3
assert blocks[0] == list(range(5))
assert blocks[1] == list(range(5, 10))
assert blocks[2] == [10, 11, 12, -1, -1]
def test_grouper():
base = range(13)
blocks = [list(block) for block in grouper(base, 5)]
assert len(blocks) == 3
assert blocks[0] == list(range(5))
assert blocks[1] == list(range(5, 10))
assert blocks[2] == [10, 11, 12, None, None]