使用Moq模拟返回值的存储库

Question

如何在mocks上设置我的测试方法接受对象的存储库？

这是我到目前为止:

Service.cs

    public int AddCountry(string countryName)
    {
        Country country = new Country();
        country.CountryName = countryName;
        return geographicsRepository.SaveCountry(country).CountryId;
    }

test.cs中

    [Test]
    public void Insert_Country()
    {
        //Setup
        var geographicsRepository = new Mock<IGeographicRepository>();

        geographicsRepository.Setup(x => x.SaveCountry(It.Is<Country>(c => c.CountryName == "Jamaica"))); //How do I return a 1 here?

        GeographicService geoService = new GeographicService(geographicsRepository.Object);

        int id = geoService.AddCountry("Jamaica");

        Assert.AreEqual(1, id);
    }

SaveCountry(Country country); 返回一个int.

我需要做两件事:

1. 首先测试,我需要告诉设置返回1的int.

2. 我需要创建第二个测试Insert_Duplicate_Country_Throws_Exception().在我的安装程序中,当我这样做时,如何告诉存储库抛出错误:

   int id = geoService.AddCountry("Jamaica");
   int id = geoService.AddCountry("Jamaica");
   

框架:

1. NUnit的.
2. 起订量.
3. ASP.NET MVC - 存储库模式.

Answer 1

你的第一个测试应该是这样的:

[Test]
public void Insert_Country()
{
    Mock<IGeographicRepository> geographicsRepository = new Mock<IGeographicRepository>();
    GeographicService geoService = new GeographicService(geographicsRepository.Object);

    // Setup Mock
    geographicsRepository
        .Setup(x => x.SaveCountry(It.IsAny<Country>()))
        .Returns(1);

    var id = geoService.AddCountry("Jamaica");

    Assert.IsInstanceOf<Int32>(id);
    Assert.AreEqual(1, id);
    geographicsRepository.VerifyAll();
}

第二个测试应如下所示:

[Test]
public void Insert_Duplicate_Country_Throws_Exception()
{
    Mock<IGeographicRepository> geographicsRepository = new Mock<IGeographicRepository>();
    GeographicService geoService = new GeographicService(geographicsRepository.Object);

    // Setup Mock
    geographicsRepository
        .Setup(x => x.SaveCountry(It.IsAny<Country>()))
        .Throws(new MyException());

    try
    {
        var id = geoService.AddCountry("Jamaica");
        Assert.Fail("Exception not thrown");
    }
    catch (MyException)
    {
        geographicsRepository.VerifyAll();
    }
}