Moq C# 调用方法进行测试

Question

我是 C# 测试的新手，我正在尝试测试一种只增加一些传递的整数值的方法（当用 5 调用它时 returns 6）。我在这里做错了什么？ result 始终为 0。

public void TestMethod2()
        {
            //Act
            int numberToCheck = 5;
            mock.CallBase = true;
            mock.Setup(x => x.CalculateTest(numberToCheck)).Returns(6);
            int result = mock.Object.CalculateTest(It.IsAny<int>());
            int expected = numberToCheck + 1;

            //Assert
            Assert.AreEqual(expected, result);
        }

Answer 1

您的测试似乎有点毫无意义。看起来你在嘲笑你想要测试的东西。通常你会像这样模拟你想要测试的位周围的所有其他东西：

//This is normally something like a repository that you link to from a service.
//You want the repo to return mocked data so you can see what your service method
//actually does in a set circumstance.
private Mock<ISomethingEffectingYourTestsToMock> _myMockObject; 
private IMyServiceUnderTest _sut;

[TestInitialize]
public void Init()
{
    _myMockObject = new Mock<ISomethingEffectingYourTestToMock>(); //mock
    _sut = new MyServiceUnderTest(your parameters); //real instance
}

[TestMethod]
public void SomeOtherMethod_should_return_23_if_input_is_20()
{
    var mockRepoOutput = 6;
    this._myMockObject.Setup(r => r.someMethod(It.IsAny<int>())).Returns(mockRepoOutput);

    var inputParam = 20;
    var expectedResult = 23;

    var result = _sut.SomeOtherMethod(inputParam);

    Assert.AreEqual(expectedResult, result);
}

开始编写一套单元测试时需要考虑的事情是常见的模拟数据、模拟设置等。如果您不必在每个测试中都设置模拟数据对象，则可以节省大量时间，并且相反，可以只调用一个方法来获得你需要的东西。

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