public void Baskets_With_Single_Bundle_Of_Different_Copies_Of_Roald_Dahl_Books_Has_Discount_Applied()
{
//Arrange
var discount = TestHelper.RandomDiscount();
var bundleSize = TestHelper.RandomInteger(1, 100);
var expectedPrice = 0M;
var basket = new Basket(new Dictionary <int, decimal>
{
{ bundleSize, discount },
}
);
for (int i = 1; i <= bundleSize; i++)
{
//Arrange
var book = new Book(code: i);
expectedPrice += book.Price;
//Act
basket.Add(book);
}
expectedPrice *= (1M - discount);
//Assert
Assert.AreEqual(expected: bundleSize, actual: basket.Items.Count);
Assert.AreEqual(expected: expectedPrice, actual: basket.Total);
}
public void Basket_With_Only_Copies_Of_Same_Roald_Dahl_Book_Costs_That_Of_Buying_As_Many_Single_Copies()
{
for (var i = 1; i <= 5; i++)
{
//Arrange
var basket = new Basket();
var qtyToAdd = TestHelper.RandomInteger(1, 100);
var book = new Book(code: i);
//Act
basket.Add(item: book, qty: qtyToAdd);
//Assert
Assert.AreEqual(expected: qtyToAdd, actual: basket.Items.Count);
Assert.AreEqual(expected: qtyToAdd * book.Price, actual: basket.Total);
}
}
public void Baskets_With_Multiple_Bundles_Of_Different_Copies_Of_Roald_Dahl_Books_Has_Discounts_Applied()
{
//Arrange
var bundleRules = new Dictionary <int, decimal>();
var books = new List <Book>();
var expectedPrice = 0M;
var maxBundleSize = TestHelper.RandomInteger(1, 10);
for (int i = 1; i < maxBundleSize; i++)
{
var discount = TestHelper.RandomDiscount();
bundleRules.Add(i, discount);
var bundlePrice = 0M;
for (int j = 1; j <= i; j++)
{
var book = new Book(code: j);
bundlePrice += book.Price;
books.Add(book);
}
expectedPrice += bundlePrice * (1M - discount);
}
var basket = new Basket(bundleRules);
//Act
foreach (var book in books)
{
basket.Add(book);
}
//Assert
Assert.AreEqual(expected: books.Count, actual: basket.Items.Count);
Assert.AreEqual(expected: expectedPrice, actual: basket.Total);
}