public void WhenCheeseIsNotExpired_TotalIsFullPriceOfCheese()
{
var expiryDate = DateTime.Today.AddDays(1);
var freshCheese = new Cheese(4.50m, new ExpiredDiscount(0.5m, expiryDate, () => DateTime.Now));
var cart = new ShoppingCart(new ICartItem[] { freshCheese });
Assert.Equal(4.50m, cart.SaleTotal);
}
public void CartWithCheeseAndScrewdriver_TotalIsSumOfBothItemsSalePrices()
{
var cheese = new Cheese(4.99m);
var driver = new Screwdriver(25.0m);
var cart = new ShoppingCart(new ICartItem[] { driver, cheese });
Assert.Equal(cheese.SalePrice + driver.SalePrice, cart.SaleTotal);
}
public void TotalDiscountsForBundle()
{
var cheese = new Cheese(4.5m);
var screwdriver = new Screwdriver(25.0m);
var bundle = new Bundle(cheese, screwdriver, new PercentageDiscount(0.1m));
var cart = new ShoppingCart(new ICartItem[] { bundle });
Assert.Equal((cheese.SalePrice + screwdriver.SalePrice) * 0.1m, cart.SaleTotal);
}
public void WhenCheeseIsExpired_TotalIncludesDiscount()
{
const decimal salePrice = 4.50m;
const decimal discount = 0.5m;
var expiryDate = DateTime.Today.AddDays(-1);
var expiredCheese = new Cheese(salePrice, new ExpiredDiscount(discount, expiryDate, () => DateTime.Now));
var cart = new ShoppingCart(new ICartItem[] { expiredCheese });
Assert.Equal(salePrice * discount, cart.SaleTotal);
}