public void Checkout_WhenTwoOfTheSameBooksArePurchased_ReturnsPriceOf16()
{
var bookshop = new Bookshop();
bookshop.AddToBasket("first");
bookshop.AddToBasket("first");
var checkoutTotal = bookshop.CheckoutBasket();
var expected = 16M;
Assert.Equal(expected, checkoutTotal.DiscountedPriceTotal);
}
public void Checkout_WhenTwoOfEveryBooksIsPurchased_ReturnsDiscountedPrice()
{
var bookshop = new Bookshop();
bookshop.AddToBasket("first");
bookshop.AddToBasket("second");
bookshop.AddToBasket("third");
bookshop.AddToBasket("fourth");
bookshop.AddToBasket("fifth");
bookshop.AddToBasket("first");
bookshop.AddToBasket("second");
bookshop.AddToBasket("third");
bookshop.AddToBasket("fourth");
bookshop.AddToBasket("fifth");
var checkoutTotal = bookshop.CheckoutBasket();
var expected = 60M;
Assert.Equal(expected, checkoutTotal.DiscountedPriceTotal);
}
public void Checkout_WhenSinglePotterBookIsPurchased_ReturnsPriceOf8(string bookNumber)
{
var bookshop = new Bookshop();
bookshop.AddToBasket(bookNumber);
var checkoutTotal = bookshop.CheckoutBasket();
var expected = 8M;
Assert.Equal(expected, checkoutTotal.DiscountedPriceTotal);
}
public void Checkout_WhenNoBooksArePurchased_ReturnsPriceOf0()
{
var bookshop = new Bookshop();
bookshop.AddToBasket("");
var checkoutTotal = bookshop.CheckoutBasket();
var expected = 0;
Assert.Equal(expected, checkoutTotal.DiscountedPriceTotal);
}
public void Checkout_WhenOnlyDifferentBooksArePurchased_ReturnsCorrectDiscountedPrice(string[] purchasedBooks, decimal expected)
{
var bookshop = new Bookshop();
foreach (string book in purchasedBooks)
{
bookshop.AddToBasket(book);
}
;
var checkoutTotal = bookshop.CheckoutBasket();
Assert.Equal(expected, checkoutTotal.DiscountedPriceTotal);
}
public void Checkout_WhenMultipleDiscountsArePossible_ReturnsLowestDiscountedPrices(string[] purchasedBooks, decimal expected)
{
var bookshop = new Bookshop();
foreach (string book in purchasedBooks)
{
bookshop.AddToBasket(book);
}
;
var checkoutTotal = bookshop.CheckoutBasket();
Assert.Equal(expected, checkoutTotal.DiscountedPriceTotal);
}