为什么我得到这个错误信息:期望#1，实际#0

本文关键字：期望实际信息错误为什么 | 更新日期: 2023-09-27 18:02:16

为什么下面使用Rhino mock的测试代码会引发这个异常:预期#1，实际#0 ?

    int PRODUCT_ID = 1;
    [TestMethod]
    public void If_Cart_Already_Exists_Then_AddToBasket_Should_Use_It_ByCallingIShoppingCartGetCart() 
    {
        ShoppingCart cart = new ShoppingCart();  //without UserName as ctor parameter
        IShoppingCartRepository shoppingCartRepository = MockRepository.GenerateMock<IShoppingCartRepository>();
        shoppingCartRepository.Expect(r => r.GetCart()).Return(cart);
        ShoppingCartController c = new ShoppingCartController(shoppingCartRepository); //DI
        c.AddToCart(PRODUCT_ID);//interAct
        shoppingCartRepository.VerifyAllExpectations(); //Error: IShoppingCartRepository.GetCart(); Expected #1, Actual #0.
    }

可能是因为期待购物车对象返回。

也许你可以使用Stub代替Expect，并使用AssertWasCalled进行验证。

public void If_Cart_Already_Exists_Then_AddToBasket_Should_Use_It_ByCallingIShoppingCartGetCart() 
{
    ShoppingCart cart = new ShoppingCart();  //without UserName as ctor parameter
    IShoppingCartRepository shoppingCartRepository = MockRepository.GenerateMock<IShoppingCartRepository>();
    shoppingCartRepository.Stub(r => r.GetCart()).Return(cart);
    ShoppingCartController c = new ShoppingCartController(shoppingCartRepository); //DI
    c.AddToCart(PRODUCT_ID);//interAct
    shoppingCartRepository.AssertWasCalled(r => r.GetCart());
}