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我有一个支持多种部署模式的项目：InMem, OnPremise, Cloud。此外，每个项目都有像 TimeDistance 这样的小型服务，可以连接到 WCF，也可以连接到 API。

在 unitTestMockup 我可以说我想使用哪一个：

Service.TimeDistance = new WCFTimeDistance() / new APITimeDistance().

到目前为止，我只有WCFTimeDistance，但现在我们处于过渡模式以转移到 APITimeDistance，但与此同时，我希望在运行测试时运行两次，一次使用 WCF，一次使用 API。

这样做的好方法是什么？

I use C# 4.5
Microsoft.VisualStudio.QualityTools.UnitTestFramework as framework for unitTests

所需工作流程的一个简单示例如下：

1)Mockup: Service.TimeDistance = new WCFTimeDistance();
2)UnitTest: CheckDistanceBetweenTwoLocationsTest()
{
Service.TimeDistance.CalculateDistance(Location1, Location2) // WCFTimeDistance
}
3)Mockup: Service.TimeDistance = new APITimeDistance();
UnitTest: CheckDistanceBetweenTwoLocationsTest()
{
4)Service.TimeDistance.CalculateDistance(Location1, Location2) //    APITimeDistance
}
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1 回答 1

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创建两个单元测试。还要考虑使用抽象而不是静态类。这将使模拟和测试更容易。

这适用于您当前的设置

[TestClass]
public class TimeDistanceTests {
    //change these to the needed types
    object Location1;
    object Location2;
    double expected;

    [TestInitialize]
    public void Init() {
        //...setup the two locations and expectations
        Location1 = //...
        Location2 = //...
        expected = //...the distance.
    }

    [TestMethod]
    public void Check_Distance_Between_Two_Locations_Using_WCF() {
        //Arrange
        var sut = new WCFTimeDistance();
        //Act
        var actual = sut.CalculateDistance(Location1, Location2);
        //Assert
        //...some assertion proving that test passes or failed
        Assert.AreEqual(expected, actual);
    }

    [TestMethod]
    public void Check_Distance_Between_Two_Locations_Using_API() {
        //Arrange
        var sut = new APITimeDistance();
        //Act
        var actual = sut.CalculateDistance(Location1, Location2);
        //Assert
        //...some assertion proving that test passes or failed
        Assert.AreEqual(expected, actual);
    }
}

理想情况下，您希望抽象服务。假设像

public interface ITimeDistance {
    double CalculateDistance(Location location1, Location location2);
}

您的服务将使用抽象而不是具体化。

public class Service {
    ITimeDistance timeDistance
    public Service(ITimeDistance timeDistance) {
        this.timeDistance = timeDistance;
    }

    public ITimeDistance TimeDistance { get { return timeDistance; } }
}

因此，现在在您的单元测试中，您可以交换时间距离服务的不同实现。

于 2016-10-03T10:48:04.393 回答