测试继承的C＃类

Question

I have the following code in c♯ but can not work out how to test it; I need to test aMethodUnderTest. I can not change ABaseClass as it is in a library. But if I am to test AClass I need to be able to set what theThing returns. Does anyone have any ideas, or experience with this type of code testing?

public ABaseClass
{
  protected ThingBaseClass theThing {get;}
  public virtual ....
  ...
}


public AClassUnderTest : ABaseClass
{
  public MyThing Thing
  {
    get
    {
      return (MyThing)base.theThing;
    }
  }

  public void aMethedUnderTest()
  {
    Thing.doSomething();
  }
}

Note: The initial value of theThing is null. theThing has no public setter.

Answer 1

我想你可以创建继承ABaseClass的mock，然后检查AClass.Thing是否返回与ABaseClassMock.theThing相同的结果

Answer 2

You can use mocking libraries like Moles. Thus you can set the value of the "thing" from your test code. http://research.microsoft.com/en-us/projects/moles/

Answer 3

You can create a mock of ABaseClass and still set theThing using MOQ (even though it has no setter)

var mock = new Mock<ABaseClass>();
mock.SetupGet(x => x.theThing).Returns(\*Whatever you need*\);