public void When_coupon_is_BLACKFRI_discount_is_35()
{
IDiscountStrategy blackFriDiscount = new BlackfriDiscountStrategy();
var discountCalculatorService = new DiscountCalculatorService(blackFriDiscount);
var order = OrderFactory.CreateOrder_BLACKFRI();
var discount = discountCalculatorService.CalculateDiscount(order);
Assert.AreEqual(35d, discount);
}