*/
p=zone.getPerception(obj, Perception.DELTA);
msg=new MessageS2CPerception(null, p);
data=enc.encode(msg);
msgs=dec.decode(null, data);
assertEquals("there should only be one message",1, msgs.size());
recv=(MessageS2CPerception)msgs.get(0);
assertTrue(recv.getAddedRPObjects().isEmpty());