factory.initialize(mailbox);
(new JidFactories()).initialize(mailbox, factory);
UnionJidFactory siuf =
new UnionJidFactory("siUnion", StringJidFactory.fac.actorType, "siUnion");
factory.registerActorFactory(siuf);
UnionJid siu1 = (UnionJid) factory.newActor("siUnion");
assertNull(siu1.getValue());
UnionJid siu2 = (UnionJid) siu1.copyJID(mailbox);
assertNull(siu2.getValue());
siu2.setValue(StringJidFactory.fac);
StringJid sj2 = (StringJid) siu2.getValue();