验证传入模拟对象的设置

Question

我正在测试我的 class

public class myclass
{
  private IAwesome awesomeObject;
  public myclass(IAwesome awesomeObject)
  {
     this.awesomeObject = awesomeObject;
  }


  public void MethodUnderTest()
  {
      this.awesomeObject.RunSomething(); //I want to verify that RunSomething was called
  }
}

我这样做的方式是：

//Arrange
var mockAwesome = new Mock<IAwesome>();
mockAwesome.Setup(x=>x.RunSomething()).Returns ... Verify()...;
//Act
var sut = new myclass(mockAwesome.object);
sut.MethodUnderTest();
//Assert
mockAwesome.Verify();

我遇到的异常是：

System.NotSupportedException : Expression references a method that does not belong to the mocked object: x => x.RunSomething

是否无法测试特定方法是否在我传递给 class 的模拟对象上执行，该对象现在是 [=23] 的私有成员的一部分=]?

Answer 1

测试时，对我来说工作得很好...

试试这个方法看看是否有不同的结果...

void Main()
{
    IAwesome awesome    = Mock.Of<IAwesome>();
    Mock<IAwesome> mock = Mock.Get(awesome);
    mock.Setup(m => m.RunSomething());

    MyClass myClass = new MyClass(awesome);
    myClass.MethodUnderTest();

    mock.Verify(m => m.RunSomething(), Times.Once);
}

public interface IAwesome
{
    void RunSomething();
}

public class MyClass
{
    private IAwesome awesomeObject;

    public myclass(IAwesome awesomeObject)
    {
        this.awesomeObject = awesomeObject;
    }

    public void MethodUnderTest()
    {
        this.awesomeObject.RunSomething();
    }
}

Answer 2

将设置行修改为 mockAwesome.Setup(x=>x.RunSomething()).Verifiable() 它应该适用于您提供的示例。

[TestClass]
public class MoqVerificationTest {
    [TestMethod]
    public void Moq_Should_Verify_Setup() {
        //Arrange
        var mockAwesome = new Mock<IAwesome>();
        mockAwesome.Setup(x => x.RunSomething()).Verifiable();
        //Act
        var sut = new myclass(mockAwesome.Object);
        sut.MethodUnderTest();
        //Assert
        mockAwesome.Verify();
    }

    public interface IAwesome {
        void RunSomething();
    }

    public class myclass {
        private IAwesome awesomeObject;
        public myclass(IAwesome awesomeObject) {
            this.awesomeObject = awesomeObject;
        }
        public void MethodUnderTest() {
            this.awesomeObject.RunSomething(); //I want to verify that RunSomething was called
        }
    }
}

要确认，请在样本 class 中注释掉 this.awesomeObject.RunSomething() 并再次运行测试。它会失败，因为您将 RunSomething 设置为 Verifiable() 但未使用它。

验证传入模拟对象的设置

verifying setup on a passed in mocked object

.net

c#

nunit

moq

visual-studio