public void Return_21_6_when_buy_3_different_book()
{
var shoppingBasket = new ShoppingBasket();
shoppingBasket.Add(1, 1);
shoppingBasket.Add(2, 1);
shoppingBasket.Add(3, 1);
var price = shoppingBasket.Price();
Check.That(price).IsEqualTo(24 * 0.90);
}
public void Return_30_when_buy_5_different_book()
{
var shoppingBasket = new ShoppingBasket();
shoppingBasket.Add(1, 1);
shoppingBasket.Add(2, 1);
shoppingBasket.Add(3, 1);
shoppingBasket.Add(4, 1);
shoppingBasket.Add(5, 1);
var price = shoppingBasket.Price();
Check.That(price).IsEqualTo(8 * 5 * 0.75);
}
public void Return_51_20_when_buy_52_different_book()
{
var shoppingBasket = new ShoppingBasket();
shoppingBasket.Add(1, 2);
shoppingBasket.Add(2, 2);
shoppingBasket.Add(3, 2);
shoppingBasket.Add(4, 1);
shoppingBasket.Add(5, 1);
var price = shoppingBasket.Price();
Check.That(price).IsEqualTo(51.20);
}
