public void Can_calculate_discount_amount_percentage()
{
var discount = new Discount()
{
UsePercentage = true,
DiscountPercentage= 30
};
discount.GetDiscountAmount(100).ShouldEqual(30);
discount.DiscountPercentage = 60;
discount.GetDiscountAmount(200).ShouldEqual(120);
}
public void Can_calculate_discount_amount_fixed()
{
var discount = new Discount()
{
UsePercentage = false,
DiscountAmount = 10
};
discount.GetDiscountAmount(100).ShouldEqual(10);
discount.DiscountAmount = 20;
discount.GetDiscountAmount(200).ShouldEqual(20);
}
public void Maximum_discount_amount_is_used()
{
var discount = new Discount
{
UsePercentage = true,
DiscountPercentage = 30,
MaximumDiscountAmount = 3.4M
};
discount.GetDiscountAmount(100).ShouldEqual(3.4M);
discount.DiscountPercentage = 60;
discount.GetDiscountAmount(200).ShouldEqual(3.4M);
discount.GetDiscountAmount(100).ShouldEqual(3.4M);
discount.DiscountPercentage = 1;
discount.GetDiscountAmount(200).ShouldEqual(2);
}
/// <summary>
/// Gets discount amount
/// </summary>
/// <param name="productVariant">Product variant</param>
/// <param name="customer">The customer</param>
/// <param name="additionalCharge">Additional charge</param>
/// <param name="quantity">Product quantity</param>
/// <param name="appliedDiscount">Applied discount</param>
/// <returns>Discount amount</returns>
public virtual decimal GetDiscountAmount(ProductVariant productVariant,
Customer customer,
decimal additionalCharge,
int quantity,
out Discount appliedDiscount)
{
appliedDiscount = null;
decimal appliedDiscountAmount = decimal.Zero;
//we don't apply discounts to products with price entered by a customer
if (productVariant.CustomerEntersPrice)
return appliedDiscountAmount;
appliedDiscount = GetPreferredDiscount(productVariant, customer, additionalCharge, quantity);
if (appliedDiscount != null)
{
decimal finalPriceWithoutDiscount = GetFinalPrice(productVariant, customer, additionalCharge, false, quantity);
appliedDiscountAmount = appliedDiscount.GetDiscountAmount(finalPriceWithoutDiscount);
}
return appliedDiscountAmount;
}
/// <summary>
/// Gets an order discount (applied to order total)
/// </summary>
/// <param name="customer">Customer</param>
/// <param name="orderTotal">Order total</param>
/// <param name="appliedDiscount">Applied discount</param>
/// <returns>Order discount</returns>
protected virtual decimal GetOrderTotalDiscount(Customer customer, decimal orderTotal, out Discount appliedDiscount)
{
appliedDiscount = null;
decimal discountAmount = decimal.Zero;
if (_catalogSettings.IgnoreDiscounts)
return discountAmount;
var allDiscounts = _discountService.GetAllDiscounts(DiscountType.AssignedToOrderTotal);
var allowedDiscounts = new List<Discount>();
if (allDiscounts != null)
foreach (var discount in allDiscounts)
if (_discountService.IsDiscountValid(discount, customer) &&
discount.DiscountType == DiscountType.AssignedToOrderTotal &&
!allowedDiscounts.ContainsDiscount(discount))
allowedDiscounts.Add(discount);
appliedDiscount = allowedDiscounts.GetPreferredDiscount(orderTotal);
if (appliedDiscount != null)
discountAmount = appliedDiscount.GetDiscountAmount(orderTotal);
if (discountAmount < decimal.Zero)
discountAmount = decimal.Zero;
if (_shoppingCartSettings.RoundPricesDuringCalculation)
discountAmount = Math.Round(discountAmount, 2);
return discountAmount;
}
/// <summary>
/// Gets discount amount
/// </summary>
/// <param name="product">Product</param>
/// <param name="customer">The customer</param>
/// <param name="productPriceWithoutDiscount">Already calculated product price without discount</param>
/// <param name="appliedDiscount">Applied discount</param>
/// <returns>Discount amount</returns>
protected virtual decimal GetDiscountAmount(Product product,
Customer customer,
decimal productPriceWithoutDiscount,
out Discount appliedDiscount)
{
if (product == null)
throw new ArgumentNullException("product");
appliedDiscount = null;
decimal appliedDiscountAmount = decimal.Zero;
//we don't apply discounts to products with price entered by a customer
if (product.CustomerEntersPrice)
return appliedDiscountAmount;
//discounts are disabled
if (_catalogSettings.IgnoreDiscounts)
return appliedDiscountAmount;
var allowedDiscounts = GetAllowedDiscounts(product, customer);
//no discounts
if (allowedDiscounts.Count == 0)
return appliedDiscountAmount;
appliedDiscount = allowedDiscounts.GetPreferredDiscount(productPriceWithoutDiscount);
if (appliedDiscount != null)
appliedDiscountAmount = appliedDiscount.GetDiscountAmount(productPriceWithoutDiscount);
return appliedDiscountAmount;
}
/// <summary>
/// Gets discount amount
/// </summary>
/// <param name="product">Product</param>
/// <param name="customer">The customer</param>
/// <param name="additionalCharge">Additional charge</param>
/// <param name="quantity">Product quantity</param>
/// <param name="appliedDiscount">Applied discount</param>
/// <returns>Discount amount</returns>
public virtual decimal GetDiscountAmount(Product product,
Customer customer,
decimal additionalCharge,
int quantity,
out Discount appliedDiscount)
{
if (product == null)
throw new ArgumentNullException("product");
appliedDiscount = null;
decimal appliedDiscountAmount = decimal.Zero;
//we don't apply discounts to products with price entered by a customer
if (product.CustomerEntersPrice)
return appliedDiscountAmount;
//discount are disabled
if (_catalogSettings.IgnoreDiscounts)
return appliedDiscountAmount;
var allowedDiscounts = GetAllowedDiscounts(product, customer);
//no discounts
if (allowedDiscounts.Count == 0)
return appliedDiscountAmount;
decimal finalPriceWithoutDiscount = GetFinalPrice(product, customer, additionalCharge, false, quantity);
appliedDiscount = allowedDiscounts.GetPreferredDiscount(finalPriceWithoutDiscount);
if (appliedDiscount != null)
appliedDiscountAmount = appliedDiscount.GetDiscountAmount(finalPriceWithoutDiscount);
return appliedDiscountAmount;
}
/// <summary>
/// Gets a shipping discount
/// </summary>
/// <param name="customer">Customer</param>
/// <param name="shippingTotal">Shipping total</param>
/// <param name="appliedDiscount">Applied discount</param>
/// <returns>Shipping discount</returns>
protected virtual decimal GetShippingDiscount(Customer customer, decimal shippingTotal, out Discount appliedDiscount)
{
appliedDiscount = null;
decimal shippingDiscountAmount = decimal.Zero;
if (_catalogSettings.IgnoreDiscounts)
return shippingDiscountAmount;
var allDiscounts = _discountService.GetAllDiscounts(DiscountType.AssignedToShipping);
var allowedDiscounts = new List<Discount>();
if (allDiscounts != null)
foreach (var discount in allDiscounts)
if (_discountService.ValidateDiscount(discount, customer).IsValid &&
discount.DiscountType == DiscountType.AssignedToShipping &&
!allowedDiscounts.ContainsDiscount(discount))
allowedDiscounts.Add(discount);
appliedDiscount = allowedDiscounts.GetPreferredDiscount(shippingTotal);
if (appliedDiscount != null)
{
shippingDiscountAmount = appliedDiscount.GetDiscountAmount(shippingTotal);
}
if (shippingDiscountAmount < decimal.Zero)
shippingDiscountAmount = decimal.Zero;
if (_shoppingCartSettings.RoundPricesDuringCalculation)
shippingDiscountAmount = RoundingHelper.RoundPrice(shippingDiscountAmount);
return shippingDiscountAmount;
}
/// <summary>
/// Gets an order discount (applied to order subtotal)
/// </summary>
/// <param name="customer">Customer</param>
/// <param name="orderSubTotal">Order subtotal</param>
/// <param name="appliedDiscount">Applied discount</param>
/// <returns>Order discount</returns>
protected virtual decimal GetOrderSubtotalDiscount(Customer customer,
decimal orderSubTotal, out Discount appliedDiscount)
{
appliedDiscount = null;
decimal discountAmount = decimal.Zero;
if (_catalogSettings.IgnoreDiscounts)
return discountAmount;
var allDiscounts = _discountService.GetAllDiscounts(DiscountType.AssignedToOrderSubTotal);
var allowedDiscounts = new List<Discount>();
if (allDiscounts != null)
foreach (var discount in allDiscounts)
if (_discountService.ValidateDiscount(discount, customer).IsValid &&
discount.DiscountType == DiscountType.AssignedToOrderSubTotal &&
!allowedDiscounts.ContainsDiscount(discount))
allowedDiscounts.Add(discount);
appliedDiscount = allowedDiscounts.GetPreferredDiscount(orderSubTotal);
if (appliedDiscount != null)
discountAmount = appliedDiscount.GetDiscountAmount(orderSubTotal);
if (discountAmount < decimal.Zero)
discountAmount = decimal.Zero;
return discountAmount;
}