EasyMock methods with parameters returning void

Question

My unit test framework replaces business service components with Mock objects using EasyMock.createMock(Interace).

These components are accessed several layers down in the class under test so I don't wish to modify either the interface definition nor the class undertest.

I then use EasyMock.expect(...) to drive the behavoir of the collaborating objects. This works great as long as the methods don't return void.

How can I drive the behavior when there are void results. Ie.

EasyMock.expect(object.Method( EasyMock.isA(arg1) ).andAnswer( new IAnswer()){
    public void anser(){
   ... do seomething meaningful with arg1...
    }).anyTimes();

Answer 1

You can use expectLastCall().andReturn("something");.

You don't mention which version of EasyMock you're using, but I think this feature has been around for a while anyway.

Read more in the documentation.