MessageCollectorActor.getFirstMatching(listenerActor, RoleChangeNotification.class);
assertNotNull(notification);
assertEquals(RaftState.Candidate.name(), notification.getOldRole());
MessageCollectorActor.getFirstMatching(listenerActor, RoleChangeNotification.class);
assertNotNull(notification);
assertEquals(RaftState.Candidate.name(), notification.getOldRole());