How to unit test abstract classes: extend with stubs?

Question

I was wondering how to unit test abstract classes, and classes that extend abstract classes.

Should I test the abstract class by extending it, stubbing out the abstr

Answer 1

This is the pattern I usually follow when setting up a harness for testing an abstract class:

public abstract class MyBase{
  /*...*/
  public abstract void VoidMethod(object param1);
  public abstract object MethodWithReturn(object param1);
  /*,,,*/
}

And the version I use under test:

public class MyBaseHarness : MyBase{
  /*...*/
  public Action