private IShoppingBasketItem CreateBasketItem(long id, Item name, decimal unitPrice, int quantity, IEnumerable <ITaxRule> taxRules)
{
var subTotal = unitPrice * quantity;
var basketItem = new DefaultShoppingBasketItem(id, name, unitPrice, taxRules)
{
Quantity = quantity,
SubTotal = subTotal,
Total = subTotal
};
return(basketItem);
}
public decimal CalculateTax(IShoppingBasket basket, IShoppingBasketItem item)
{
var unitItemTax = 0m;
foreach (var band in _taxBands)
{
var applicableValue = (band.Cap ?? item.UnitPrice) - band.Threshold;
var temporaryItem = new DefaultShoppingBasketItem {
SubTotal = applicableValue, Quantity = 1
}; // remove explicit instantiation from here
unitItemTax += band.TaxRule.CalculateTax(basket, temporaryItem);
}
var itemTax = unitItemTax * item.Quantity;
UpdateTotals(basket, item, itemTax);
return(itemTax);
}
