Question

I have a class which generates events e.g.

public class EventSource{
 public addEventListener(EventListener listener).....
 public raiseEvent(){
    Event e=....
    listener.handle(e);

 }

}

I’m using Mockito to mock an EventListener and want to do an equality on the event object (e.g. event.getTime()..event.getMessage() etc). The event object doesnt have an equals method so I cant easily create another object and do an assert.

Whats the normal way of doing this with Mockito?

Answer 1

It looks like you want to use an argument captor.

For example:

ArgumentCaptor<Event> argument = ArgumentCaptor.forClass(Event.class);
verify(mockedListener).handle(argument.capture());
assertEquals("ExpectedMessage", argument.getValue().getMessage());