使用 Moq 验证方法调用 [英] Verify a method call using Moq

问题描述

我对 C# 中的单元测试和学习使用 Moq 相当陌生.下面是我要测试的课程.

I am fairly new to unit testing in C# and learning to use Moq. Below is the class that I am trying to test.

class MyClass
{
    SomeClass someClass;
    public MyClass(SomeClass someClass)
    {
        this.someClass = someClass;     
    }

    public void MyMethod(string method)
    {
        method = "test"
        someClass.DoSomething(method);
    }   
}

class Someclass
{
    public DoSomething(string method)
    {
        // do something...
    }
}

下面是我的测试类:

class MyClassTest
{
    [TestMethod()]
    public void MyMethodTest()
    {
        string action="test";
        Mock<SomeClass> mockSomeClass = new Mock<SomeClass>();
        mockSomeClass.SetUp(a => a.DoSomething(action));
        MyClass myClass = new MyClass(mockSomeClass.Object);
        myClass.MyMethod(action);
        mockSomeClass.Verify(v => v.DoSomething(It.IsAny<string>()));
    }
}

我收到以下异常:

Expected invocation on the mock at least once, but was never performed
No setups configured.
No invocations performed..

我只想验证是否正在调用方法MyMethod".我错过了什么吗?

I just want to verify if the method "MyMethod" is being called or not. Am I missing something?

推荐答案

您正在检查错误的方法.Moq 要求您设置(然后选择验证)依赖类中的方法.

You're checking the wrong method. Moq requires that you Setup (and then optionally Verify) the method in the dependency class.

你应该做更多这样的事情:

You should be doing something more like this:

class MyClassTest
{
    [TestMethod]
    public void MyMethodTest()
    {
        string action = "test";
        Mock<SomeClass> mockSomeClass = new Mock<SomeClass>();

        mockSomeClass.Setup(mock => mock.DoSomething());

        MyClass myClass = new MyClass(mockSomeClass.Object);
        myClass.MyMethod(action);

        // Explicitly verify each expectation...
        mockSomeClass.Verify(mock => mock.DoSomething(), Times.Once());

        // ...or verify everything.
        // mockSomeClass.VerifyAll();
    }
}

换句话说，您正在验证调用 MyClass#MyMethod，您的类肯定会在该过程中调用一次 SomeClass#DoSomething.请注意，您不需要 Times 参数；我只是在展示它的价值.

In other words, you are verifying that calling MyClass#MyMethod, your class will definitely call SomeClass#DoSomething once in that process. Note that you don't need the Times argument; I was just demonstrating its value.

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