public void GivenShoppingCartWithThreeItems_WhenGettingTotalPrice_ThenReturnsSumOfPriceOfContainedItems()
{
// Arrange
IShoppingCart shoppingCart = CreateShoppingCart();
var firstItemPrice = 100.00;
var secondItemPrice = 0.65;
var thirdItemPrice = 14.25;
var firstProductItem = new Mock <IProductItem>();
firstProductItem.Setup(pi => pi.Price).Returns(firstItemPrice);
var secondProductItem = new Mock <IProductItem>();
secondProductItem.Setup(pi => pi.Price).Returns(secondItemPrice);
var thirdProductItem = new Mock <IProductItem>();
thirdProductItem.Setup(pi => pi.Price).Returns(thirdItemPrice);
shoppingCart.AddProductItem(firstProductItem.Object);
shoppingCart.AddProductItem(secondProductItem.Object);
shoppingCart.AddProductItem(thirdProductItem.Object);
// Act
var totalPrice = shoppingCart.TotalPrice;
// Assert
Assert.That(totalPrice, Is.EqualTo(firstItemPrice + secondItemPrice + thirdItemPrice));
}
public void GivenEmptyShoppingCart_WhenAddingProductItem_ThenContainsExpectedProductItem()
{
// Arrange
var productItem = Mock.Of <IProductItem>();
IShoppingCart shoppingCart = CreateShoppingCart();
// Act
shoppingCart.AddProductItem(productItem);
// Assert
Assert.That(shoppingCart.ProductItems.First(), Is.EqualTo(productItem));
}
