public void apply_all_individual_discounts()
{
Products products = new Products();
AddProduct(products, new Butter(), 2);
AddProduct(products, new Bread(), 1);
AddProduct(products, new Milk(), 4);
Money discount = _discounts.Apply(products);
var severalDiscountsApplied = 1.65m;
Assert.Equal(new Money(severalDiscountsApplied), discount);
}
public Money Total()
{
return(_products.Cost() - _discounts.Apply(_products));
}