public Item(Country saleCountry, Article article, int quantity, Tax tax)
{
_tax = tax;
Id = article.Id;
Name = article.Name;
UnitPriceBeforeTaxes = article.Price;
TotalPriceAfterTaxes = _tax.ApplyTo(quantity * article.Price);
Quantity = quantity;
IsImported = saleCountry != article.SupplierCountry;
}
public void Tax20ShouldIncreasePriceAfterTax()
{
Product product = Product.Sample;
Tax tax = new Tax(20);
AffectPriceResult result = tax.ApplyTo(product.Price);
string expected = "Product price reported as $20.25 before tax and $24.30 after 20% tax";
Assert.AreEqual(expected, result.DescribeWith(product, tax));
}
public void NoneTaxShouldNotAffectPrice()
{
Product product = Product.Sample;
Tax tax = Tax.None;
AffectPriceResult result = tax.ApplyTo(product.Price);
string expected = "Product price reported as $20.25 before tax and $20.25 after 0% tax";
Assert.AreEqual(expected, result.DescribeWith(product, tax));
}
public void Tax20Discount15ShouldAffectPriceAfterTax()
{
Product product = Product.Sample;
Tax tax = new Tax(20);
AffectPriceResult taxResult = tax.ApplyTo(product.Price);
Discount discount = new Discount(15);
AffectPriceResult discountResult = discount.ApplyTo(product.Price);
Amount priceAfterAll = product.Price + taxResult.AffectedAmount - discountResult.AffectedAmount;
Assert.AreEqual("20%", tax.ToString());
Assert.AreEqual("$4.05", taxResult.AffectedAmount.ToString());
Assert.AreEqual("15%", discount.ToString());
Assert.AreEqual("$3.04", discountResult.AffectedAmount.ToString());
Assert.AreEqual("$21.26", priceAfterAll.ToString());
}
private static void CheckReceiptTaxedPrice(int n, IReadOnlyList <Category> categories, Country supplierCountry, Country checkoutCountry, Tax expectedTax)
{
var catalog = new Catalog();
var checkout = new Checkout(checkoutCountry, catalog, new TaxEngine());
decimal nonTaxedPrice = 0;
Enumerable.Range(1, n)
.ForEach(x =>
{
var category = categories[x % categories.Count];
var name = Guid.NewGuid().ToString();
var price = x;
var article = new Article(x, supplierCountry, category, name, price);
catalog.TryAdd(article);
var quantity = x;
var origin = checkoutCountry == supplierCountry ? Origin.Local : Origin.Imported;
var good = new Good(article.Name, quantity, price, origin);
checkout.Scan(good);
nonTaxedPrice += x * x;
});
Assert.Equal(expectedTax.ApplyTo(nonTaxedPrice), checkout.EmitReceipt().Total);
}
public void IncreaseQuantity(int quantity)
{
Quantity += quantity;
TotalPriceAfterTaxes = _tax.ApplyTo(Quantity * UnitPriceBeforeTaxes);
}