def test_find_newest_item():
item_a = Clothing(condition=4, age=datetime.datetime(2021, 2, 1))
item_b = Decor(condition=4, age=datetime.datetime(2021, 3, 1))
item_c = Clothing(condition=4, age=datetime.datetime(2021, 4, 1))
item_d = Decor(condition=4, age=datetime.datetime(2021, 5, 1))
item_e = Clothing(condition=4, age=datetime.datetime(2021, 6, 1))
tai = Vendor(inventory=[item_a, item_b, item_c, item_d, item_e])
newest_item = tai.find_newest_item()
assert newest_item == item_e
def test_find_newest_item_returns_none_if_no_items():
tai = Vendor(inventory=[])
newest_item = tai.find_newest_item()
assert newest_item == None
