public void GivenEmptyDecoratorOnRunningProductsCountShoppingCart_WhenProductsWithAssociatedOfferAdded_ThenBehavesAsExpected()
{
// Arrange
var product1 = new Product("some product", 3.0);
var product2 = new Product("another product", 5.0);
var cart = new HandleProductsWithAssociatedOfferShoppingCartDecorator(new RunningProductsCountShoppingCart());
IProduct Offer(IProduct product, uint quantity)
{
if (quantity >= 1)
{
return(new DiscountAsProduct(product.Name + " - Buy 1 get 50% off next", product.UnitPrice / 2));
}
return(new NullProduct());
}
var product1WithOffer = new ProductWithAssociatedOffer(product1, Offer);
//Act
cart.AddProduct(product1WithOffer, 4);
cart.AddProduct(product2, 12);
cart.AddProduct(product2, 8);
cart.AddProduct(product1WithOffer, 2);
// Assert
Assert.That(cart.GetTotalPrice(), Is.EqualTo(116.50));
Assert.That(cart.GetTotalDiscount(), Is.EqualTo(1.50));
}
public void GivenNoObject_WhenDecoratorCreated_ThenReturnsAnInstanceOfIProductAddingShoppingCart()
{
// Arrange, Act
var cart = new HandleProductsWithAssociatedOfferShoppingCartDecorator(Mock.Of <IProductAddingShoppingCart>());
// Assert
Assert.That(cart, Is.InstanceOf(typeof(IProductAddingShoppingCart)));
}
public void GivenEmptyDecoratorOnRunningProductsCountShoppingCart_WhenProductsWithNoAssociatedOfferAdded_ThenBehavesAsRunningProductsCountShoppingCart()
{
// Arrange
var product1 = new Product("some product", 3.0);
var product2 = new Product("another product", 5.0);
var cart = new HandleProductsWithAssociatedOfferShoppingCartDecorator(new RunningProductsCountShoppingCart());
//Act
cart.AddProduct(product1, 4);
cart.AddProduct(product2, 12);
cart.AddProduct(product2, 8);
// Assert
Assert.That(cart.Products.Count(p => p.Name == "another product"), Is.EqualTo(20));
Assert.That(cart.Products.Count, Is.EqualTo(24));
Assert.That(cart.GetTotalPrice(), Is.EqualTo(112.00));
}
