def test_date_price_change(self):
a = Item("shirt", 31.00)
new_date = date(2019, 6, 10)
a.set_sale_price(19.75, new_date)
self.assertEqual(a.get_date_price_change(), new_date)
def test_date_price_change_default(self):
start_date = date(2019, 6, 10)
end_date = date(2019, 6, 20)
rp = RedPencil(start_date, end_date)
a = Item("hat", 20.00)
rp.load_product(a)
self.assertEqual(a.get_date_price_change(), None)
