def order():
return Order(100)
def test_order_discount_strategy_validate_error():
order = Order(10, discount_strategy=on_sale_discount)
assert order.discount_strategy is None
def test_discount_apply_success(func, price, discount):
order = Order(price, func)
assert order.apply_discount() == discount
def test_order_discount_strategy_validate_success(func, price):
order = Order(price, func)
assert order.price == price
assert order.discount_strategy == func