使用Moq验证方法调用

Question

我对C#中的单元测试相当新,并且学习使用Moq.以下是我要测试的课程.

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...
    }
}

以下是我的TestClass:

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>()));
    }
}

我得到以下异常:

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

我只是想验证是否正在调用方法"MyMethod".我错过了什么吗？

提前致谢!

Answer 1

你正在检查错误的方法.Moq要求您在依赖类中设置(然后可选地验证)方法.

你应该做更像这样的事情:

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SomeClass#DoSomething在该过程中调用一次.请注意,您不需要Times参数; 我只是在展示它的价值.