public void ReturnZero_WhenCalledWithNoProductsInTheCarProductsCollection()
{
// arrange
var cart = new FakeShoppingCart();
// act
var totalPrice = cart.TotalPrice();
// assert
Assert.AreEqual(0, totalPrice);
}
public void ReturnTotalPriceOfAllProductsInTheProductCollection_WhenCalledWithPresenteProducts()
{
// arrange
var cart = new FakeShoppingCart();
var productStub = new Mock <IProduct>();
decimal price = 22;
productStub.Setup(x => x.Price).Returns(price);
cart.Products.Add(productStub.Object);
// act
var totalPrice = cart.TotalPrice();
// assert
Assert.AreEqual(price, totalPrice);
}