public void TenPercentDiscount()
{
// ARRANGE
SupermarketCatalog catalog = new FakeCatalog();
var toothbrush = new Product("toothbrush", ProductUnit.Each);
catalog.AddProduct(toothbrush, 0.99);
var apples = new Product("apples", ProductUnit.Kilo);
catalog.AddProduct(apples, 1.99);
var cart = new ShoppingCart();
cart.AddItemQuantity(apples, 2.5);
var teller = new Teller(catalog);
teller.AddSpecialOffer(SpecialOfferType.TenPercentDiscount, toothbrush, 10.0);
// ACT
var receipt = teller.ChecksOutArticlesFrom(cart);
// ASSERT
Assert.Equal(4.975, receipt.GetTotalPrice());
Assert.Equal(new List <Discount>(), receipt.GetDiscounts());
Assert.Single(receipt.GetItems());
var receiptItem = receipt.GetItems()[0];
Assert.Equal(apples, receiptItem.Product);
Assert.Equal(1.99, receiptItem.Price);
Assert.Equal(2.5 * 1.99, receiptItem.TotalPrice);
Assert.Equal(2.5, receiptItem.Quantity);
}
public void AddMultipleTimesSameProduct()
{
// ARRANGE
var cart = new ShoppingCart();
cart.AddItemQuantity(Apples, 2.5);
cart.AddItemQuantity(Apples, 1.5);
cart.AddItemQuantity(Apples, 3);
// ACT
var teller = CreateTeller();
var receipt = teller.ChecksOutArticlesFrom(cart);
// ASSERT
var printReceipt = new ReceiptPrinter().PrintReceipt(receipt);
Approvals.Verify(printReceipt);
}
public void With10PercentDiscount()
{
// ARRANGE
var cart = new ShoppingCart();
cart.AddItemQuantity(Apples, 2.5);
cart.AddItemQuantity(Toothbrush, 3);
var teller = CreateTeller();
teller.AddSpecialOffer(SpecialOfferType.TenPercentDiscount, Toothbrush, 10.0);
// ACT
var receipt = teller.ChecksOutArticlesFrom(cart);
// ASSERT
var printReceipt = new ReceiptPrinter().PrintReceipt(receipt);
Approvals.Verify(printReceipt);
}
public void WithoutDiscount()
{
// ARRANGE
var cart = new ShoppingCart();
cart.AddItemQuantity(Apples, 2.5);
// ACT
var teller = CreateTeller();
var receipt = teller.ChecksOutArticlesFrom(cart);
// ASSERT
var printReceipt = new ReceiptPrinter().PrintReceipt(receipt);
Approvals.Verify(printReceipt);
}
public void GivenProductWithNoDiscount_WhenCheckOut_ThenReturnTotalProductPrice()
{
Product apples = new Product("apples", ProductUnit.Kilo);
catalog.AddProduct(apples, 1.99);
cart.AddItemQuantity(apples, 2.5);
teller = new Teller(catalog);
Receipt receipt = teller.ChecksOutArticlesFrom(cart);
Assert.That(receipt.GetTotalPrice(), Is.EqualTo(4.975));
Assert.AreEqual(new List <Discount>(), receipt.GetDiscounts());
Assert.That(receipt.GetItems(), Has.Exactly(1).Items);
ReceiptItem receiptItem = receipt.GetItems()[0];
Assert.AreEqual(apples, receiptItem.Product);
Assert.AreEqual(1.99, receiptItem.Price);
Assert.AreEqual(2.5 * 1.99, receiptItem.TotalPrice);
Assert.AreEqual(2.5, receiptItem.Quantity);
}
