+ @Test
+ public void testRaftRoleChangeNotifierWhenRaftActorHasPeers() throws Exception {
+ new JavaTestKit(getSystem()) {{
+ ActorRef notifierActor = factory.createActor(Props.create(MessageCollectorActor.class));
+ MessageCollectorActor.waitUntilReady(notifierActor);
+
+ DefaultConfigParamsImpl config = new DefaultConfigParamsImpl();
+ long heartBeatInterval = 100;
+ config.setHeartBeatInterval(FiniteDuration.create(heartBeatInterval, TimeUnit.MILLISECONDS));
+ config.setElectionTimeoutFactor(1);
+
+ String persistenceId = factory.generateActorId("notifier-");
+
+ factory.createActor(MockRaftActor.props(persistenceId,
+ ImmutableMap.of("leader", "fake/path"), Optional.<ConfigParams>of(config), notifierActor), persistenceId);
+
+ List<RoleChanged> matches = null;
+ for(int i = 0; i < 5000 / heartBeatInterval; i++) {
+ matches = MessageCollectorActor.getAllMatching(notifierActor, RoleChanged.class);
+ assertNotNull(matches);
+ if(matches.size() == 3) {
+ break;
+ }
+ Uninterruptibles.sleepUninterruptibly(heartBeatInterval, TimeUnit.MILLISECONDS);
+ }
+
+ assertEquals(2, matches.size());
+
+ // check if the notifier got a role change from null to Follower
+ RoleChanged raftRoleChanged = matches.get(0);
+ assertEquals(persistenceId, raftRoleChanged.getMemberId());
+ assertNull(raftRoleChanged.getOldRole());
+ assertEquals(RaftState.Follower.name(), raftRoleChanged.getNewRole());
+
+ // check if the notifier got a role change from Follower to Candidate
+ raftRoleChanged = matches.get(1);
+ assertEquals(persistenceId, raftRoleChanged.getMemberId());
+ assertEquals(RaftState.Follower.name(), raftRoleChanged.getOldRole());
+ assertEquals(RaftState.Candidate.name(), raftRoleChanged.getNewRole());
+
+ }};
+ }
+