def test_basic(self):
c = Calendar()
c = c.add(Day("came 9 left 15 lunch 30m", today))
c, _ = c.undo()
c, date_ = c.redo()
assert "30" in ConsoleDayShower(c).show_days(today, 1)
assert date_ == today
def test_return_none_instead_of_date_if_nothing_to_redo(self):
c = Calendar()
c, date_ = c.redo()
assert date_ is None