public WebStoreCart CalculateCartTax(WebStoreCart cart)
{
// TODO: Make this real. Mocking for now
foreach (var item in cart.CartItems)
{
cart.TaxAmount += Math.Round(item.ExtendedPrice * 0.07m, 2); // just assuming 7% tax for everything for now
}
// update the cart total with the tax amount
cart.Total += Math.Round(cart.TaxAmount, 2);
return(cart);
}
public void TaxCalculationEngine_CalculateCartTax()
{
var address = new Address()
{
First = "Marvin",
Last = "Waller",
Addr1 = "4928 Commerce Boulevard",
State = "Nebraska",
City = "Lincoln",
Postal = "68508",
};
WebStoreCart wsCart = new WebStoreCart()
{
Id = new Guid("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee"),
SubTotal = 15.00m,
Total = 15.00m,
BillingAddress = address,
ShippingAddress = address,
CartItems = new WebStoreCartItem[]
{
new WebStoreCartItem()
{
ProductId = 1,
ProductName = "Test Product 1",
UnitPrice = 5.99m,
Quantity = 2,
ExtendedPrice = 10.00m
},
new WebStoreCartItem()
{
ProductId = 2,
ProductName = "Test Product 2",
UnitPrice = 5.99m,
Quantity = 1,
ExtendedPrice = 5.99m
},
}
};
var taxCalculationEngine = new EngineFactory(new AmbientContext(), null, null).CreateEngine <ITaxCalculationEngine>();
var result = taxCalculationEngine.CalculateCartTax(wsCart);
Assert.AreEqual(15.00m, result.SubTotal);
Assert.AreEqual(1.12m, result.TaxAmount);
Assert.AreEqual(16.12m, result.Total);
}
public WebStoreCart GenerateCartPricing(Cart cart)
{
WebStoreCart result = new WebStoreCart();
// map the cart input to a webstore cart
DTOMapper.Map(cart, result);
// loop through all cart items, get the current price and apply to the cart item
ICatalogAccessor catAccessor = AccessorFactory.CreateAccessor <ICatalogAccessor>();
foreach (WebStoreCartItem item in result.CartItems)
{
if (item.Quantity > 0)
{
// get the current unit price and update the cart item
var product = catAccessor.FindProduct(item.ProductId);
if (product != null)
{
decimal unitPrice = product.Price;
decimal extendedPrice = Math.Round(unitPrice * item.Quantity, 2);
// update the web store cart
item.UnitPrice = unitPrice;
item.ExtendedPrice = extendedPrice;
// add the amount to the subtotal
result.SubTotal += Math.Round(extendedPrice, 2);
}
else
{
Logger.Error("Invalid Product Id");
throw new ArgumentException("Invalid Product Id");
}
}
else
{
Logger.Error("Invalid item quantity");
throw new ArgumentException("Invalid item quantity");
}
}
// set the cart total to the subtotal
result.Total = result.SubTotal;
return(result);
}
public WebStoreCart CalculateCartTax(WebStoreCart cart)
{
if (cart != null && cart.BillingAddress != null && !string.IsNullOrWhiteSpace(cart.BillingAddress.Postal))
{
var taxRate =
AccessorFactory.CreateAccessor<ITaxRateAccessor>()
.Rate(cart.BillingAddress);
foreach (var item in cart.CartItems)
{
cart.TaxAmount += Math.Round(item.ExtendedPrice * taxRate, 2);
}
// update the cart total with the tax amount
cart.Total += Math.Round(cart.TaxAmount, 2);
}
return cart;
}
