public void GivenNoScannedItems_TotalReturnsZero()
{
const decimal expectedTotal = 0;
var priceReader = new MemoryPriceReader();
var promotionCalculator = new PromotionCalculator();
var checkout = new Checkout(priceReader, promotionCalculator);
var total = checkout.Total();
Assert.AreEqual(expectedTotal, total);
}
public void ScanOneProduct_TotalReturnsPrice()
{
const decimal expectedTotal = 0.5m;
var priceReader = new MemoryPriceReader();
var promotionCalculator = new PromotionCalculator();
var checkout = new Checkout(priceReader, promotionCalculator);
var item = new Item("A99");
checkout.Scan(item);
var total = checkout.Total();
Assert.AreEqual(expectedTotal, total);
}
public void ScanTwoProducts_TotalReturnsPriceOfBoth()
{
const decimal expectedTotal = 0.8m;
var priceReader = new MemoryPriceReader();
var promotionCalculator = new PromotionCalculator();
var checkout = new Checkout(priceReader, promotionCalculator);
var itemA = new Item("A99");
var itemB = new Item("B15");
checkout.Scan(itemA);
checkout.Scan(itemB);
var total = checkout.Total();
Assert.AreEqual(expectedTotal, total);
}
public void TwoB15_Returns045()
{
const decimal expectedTotal = 0.45m;
var priceReader = new MemoryPriceReader();
var promotions = new List <IPromotion>
{
new A99Promotion(),
new B15Promotion()
};
var promotionCalculator = new PromotionCalculator(promotions);
var checkout = new Checkout(priceReader, promotionCalculator);
var item = new Item("B15");
checkout.Scan(item);
checkout.Scan(item);
var total = checkout.Total();
Assert.AreEqual(expectedTotal, total);
}
