final EventList<String> nickNames = u.getNickNames();
final EventList<Email> emails = u.getEmailAddresses();
UnserializableListener listener = new UnserializableListener();
nickNames.addListEventListener(listener);
SerializableListener serListener = new SerializableListener();
nickNames.addListEventListener(serListener);
nickNames.add("Testit");
assertEquals(nickNames, UnserializableListener.getLastSource());
assertEquals(nickNames, SerializableListener.getLastSource());