def test_is_valid_orders(self):
orders = Orders('10 IMG 15 FLAC 13 VID') # valid order format
self.assertIsNotNone(orders.parse_orders())
def test_is_invalid_orders(self):
# orders = Orders('IMG 10 FLAC 15 VID 13') # invalid order format
orders = Orders('IMG 10') # invalid order format
self.assertIsNone(orders.parse_orders())
