Question

我收到错误

在模拟上调用一次，但是0次

以下是我的代码结构

public class GenerateAddress : IGenerateAddress 
{
    public GenerateAddress(IAddress createAdd, IValidate validate) {
       //constructor 
    }

    public Address GetAddressFromA(string name){..}
}

public class SaveAddress : ISaveAddress 
{
    public SaveAddress(IGenerateAddress generateaddress) {
        //constructor 
    }

    public bool Save(string name)
    {
        var address = generateaddress.GetAddressFromA(name);
        ......
        //Rest of the code to save 
    }
}

测试类SaveAddress的测试方法

public void TestVerifyGetAddressIsCalled()
{
    var mockIAddress = new Mock<IAddress>();
    var mockValidate = new Mock<IValidate>();

    var genAddress = new Mock<IGenerateAddress>();

    var objGenAdress = new GenerateAddress(mockIAddress.Object, mockValidate.Object) // 

    var objSaveAddress = new SaveAddress(objGenAdress);

    objSaveAddress.Save("dddd");

    //Verify if IGenerateAddress 'GenerateAddress' is called

    genAddress.Verify(a=>a.GenerateAddress("ddddd"),Times.Once); // Throws Excepted Invocation 
}

我需要验证是否调用GenerateAddress。我也做了Setup并为 Address 对象分配了值，但即使这些值也没有设置。不确定出了什么问题。

Answer 1

看起来你正在用'dddd'（4 d's）调用Save，但验证它是用'ddddd'（5 d's）调用的。

将实际数据放在变量中并在两种情况下引用它都更安全：

var name = "dddd";
objSaveAddress.Save(name);

genAddress.Verify(a=>a.GenerateAddress(name),Times.Once);

Answer 2

您正在使用IGenerateAddress手动创建的objGenAdress SaveAddress而不是模拟的genAddress。

另外，假设SUT是只需SaveAddress的{{1}}，则不需要其他模拟。

IGenerateAddress

Answer 3

我认为在选择回复后，如果我们重构代码首先创建SaveAddress类作为模拟并传递参数genAddress，并将CallBase属性设置为true。此属性的默认值为false。如果你不使用这个参数，你的方法调用返回null，你得到this.post标题错误。

        var genAddress = new Mock<IGenerateAddress>();

        var objSaveAddress = new Mock<SaveAddress>(genAddress.Object){CallBase = true};

        var name = "dddd";

        //Act
        objSaveAddress.Object.Save(name);

        //Assert
        //Verify if IGenerateAddress 'GenerateAddress' is called    
        genAddress.Verify(a => a.GetAddressFromA(name), Times.Once);

在模拟上预期调用一次，但是Moq是0次

3 个答案: