final CyclicBarrier barrier = new CyclicBarrier(2);
Message message = mock(Message.class);
final Message response = mock(Message.class);
OutputStream out = mock(OutputStream.class);
final ResponderMessage responderMessage = new ResponderMessage(message, new Nop());
when(responder.register(same(channel), same(message))).thenReturn(responderMessage);
when(message.getId()).thenReturn("test");
when(response.isResponseTo()).thenReturn("test");
when(source.open()).thenReturn(stream);