NamedMessage messageOne = new NamedMessage( "messageOne" );
NamedMessage messageTwo = new NamedMessage( "messageTwo" );
NamedMessage messageThree = new NamedMessage( "messageThree" );
bus.publish( messageOne );
bus.publish( messageTwo );
bus.publish( messageThree );
assertEquals(2, listener.handledByOne.size());
assertTrue( listener.handledByOne.contains( messageOne ) );
assertTrue(listener.handledByOne.contains(messageTwo));