Moq与Unity Container单元测试

Question

下面是我试图进行单元测试的生产代码示例.我正在努力解决对正在使用的具体类的依赖.

public MyClass(IUnityContainer container)
{
    this.unityContainer = container;
}

public string DoWork()
{
     var sender = unityContainer.Resolve<IInterface>();  // how to setup this object
     var json = sender.Send("something");
     var value = serializer.Deserialize<SomeModel>(json);
     return value.url;
}

我想模仿这种方法使用的IInterface.如何在我的单元测试代码中进行设置？我觉得这里缺少一些东西.这有一种反模式的气味......

Answer 1

这有一种反模式的气味

当然可以.为什么要将实例传递给DI容器到业务对象的构造函数中？你应该通过IInterface代替.请参阅构造函数中的Dependency Injection容器.

Anyway to make this work in your unit test, you just have to set up the container to return an instance or a mock of IInterface. Like this:

public void MyUnitTest()
{
    IUnityContainer myContainer = new UnityContainer();
    myContainer.RegisterType<IInterface, YourInstance>();

    MyClass classUnderTest = new MyClass(myContainer);
    classUnderTest.DoWork();

    Assert...
}

See How to use Unity.RegisterType with Moq? to mock the YourInstance.