public void WhenItemsDiscounted_TotalIsCorrect()
{
var basket = new Basket(carrierBagProvider);
var discount = new MultiBuyDiscount(2, 10);
var item1 = new Item('A', 20, discount);
var item2 = new Item('A', 20, discount);
basket.Scan(item1);
basket.Scan(item2);
Assert.AreEqual(35, basket.GetTotalPrice());
}
public void WhenMixOfDiscountAndNonDiscountItems_TotalIsCorrect()
{
var basket = new Basket(carrierBagProvider);
var buyThreeSave20 = new MultiBuyDiscount(3, 20);
var apple = new Item('A', 50, buyThreeSave20);
var buyTwoSave15 = new MultiBuyDiscount(2, 15);
var grape = new Item('B', 30, buyTwoSave15);
var cherry = new Item('C', 20);
var melon = new Item('D', 15);
basket.Scan(apple);
basket.Scan(apple);
basket.Scan(apple);
basket.Scan(grape);
basket.Scan(grape);
basket.Scan(cherry);
basket.Scan(melon);
Assert.AreEqual(220, basket.GetTotalPrice());
}
public void WhenDiscountTotalIsLessThanOne_ExceptionThrown()
{
var discount = new MultiBuyDiscount(3, 0);
}
public void WhenDiscountAppliedToLessThanOneItem_ExceptionThrown()
{
var discount = new MultiBuyDiscount(0, 10);
}
