/// <summary>
/// 計算折扣
/// </summary>
/// <param name="discount">折扣</param>
/// <returns>折扣後金額</returns>
public int CalculateDiscount(IDiscount discount)
{
int checkoutAmount = this.OriginalPrice;
checkoutAmount = this.OriginalPrice - discount.CalculateDiscountAmount(this.OriginalPrice);
return(checkoutAmount);
}
public void Caclulate_Discount_No_Special_Offers_To_Be_Applied_Returns_Zero()
{
// Arrange
var items = new List <Item>
{
new Item
{
SKU = "A99",
Price = 0.50m
},
new Item
{
SKU = "B15",
Price = 0.30m
},
new Item
{
SKU = "C40",
Price = 0.60m
}
};
// Act
var discount = _discount.CalculateDiscountAmount(items);
// Assert
Assert.AreEqual(0, discount);
}
public decimal Total()
{
if (!_items.Any())
{
return(0);
}
var total = _items.Sum(item => item.Price);
var discountAmount = _discount.CalculateDiscountAmount(_items);
return(total - discountAmount);
}