def test_pos_total_pos_count_max(self):
g = utils.offset_range(42, 20)
assert next(g) == (0, 20)
assert next(g) == (20, 20)
assert next(g) == (40, 2)
with raises(StopIteration):
next(g)
def test_neg_total_pos_count_max(self):
with raises(ValueError):
next(utils.offset_range(-1, 42))
def test_pos_total_zero_count_max(self):
with raises(ValueError):
next(utils.offset_range(42, 0))