X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-akka-raft%2Fsrc%2Ftest%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fraft%2Fbehaviors%2FCandidateTest.java;h=60f45523cf204d5d246fb14ac01eddc4dcc760ba;hb=c31509c7a6630e54a9f9749a643fed5e1a1ad380;hp=6a3040d84352ca6a809bbab028d01f705218204d;hpb=583f6075e842a6a37b83bd01e478aebc70c6af73;p=controller.git diff --git a/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/CandidateTest.java b/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/CandidateTest.java index 6a3040d843..60f45523cf 100644 --- a/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/CandidateTest.java +++ b/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/CandidateTest.java @@ -1,12 +1,216 @@ package org.opendaylight.controller.cluster.raft.behaviors; -import org.opendaylight.controller.cluster.raft.RaftActorContext; - +import static org.junit.Assert.assertEquals; +import akka.actor.ActorRef; +import akka.actor.Props; +import akka.testkit.TestActorRef; import java.util.Collections; +import java.util.HashMap; +import java.util.Map; +import org.junit.After; +import org.junit.Before; +import org.junit.Test; +import org.opendaylight.controller.cluster.raft.MockRaftActorContext; +import org.opendaylight.controller.cluster.raft.RaftActorContext; +import org.opendaylight.controller.cluster.raft.RaftState; +import org.opendaylight.controller.cluster.raft.ReplicatedLogEntry; +import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout; +import org.opendaylight.controller.cluster.raft.messages.AppendEntries; +import org.opendaylight.controller.cluster.raft.messages.AppendEntriesReply; +import org.opendaylight.controller.cluster.raft.messages.RaftRPC; +import org.opendaylight.controller.cluster.raft.messages.RequestVote; +import org.opendaylight.controller.cluster.raft.messages.RequestVoteReply; +import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor; public class CandidateTest extends AbstractRaftActorBehaviorTest { - @Override protected RaftActorBehavior createBehavior(RaftActorContext actorContext) { - return new Candidate(actorContext, Collections.EMPTY_LIST); + private final TestActorRef candidateActor = actorFactory.createTestActor( + Props.create(MessageCollectorActor.class), actorFactory.generateActorId("candidate")); + + private TestActorRef[] peerActors; + + private RaftActorBehavior candidate; + + @Before + public void setUp(){ + } + + @Override + @After + public void tearDown() throws Exception { + if(candidate != null) { + candidate.close(); + } + + super.tearDown(); + } + + @Test + public void testWhenACandidateIsCreatedItIncrementsTheCurrentTermAndVotesForItself(){ + RaftActorContext raftActorContext = createActorContext(); + long expectedTerm = raftActorContext.getTermInformation().getCurrentTerm(); + + candidate = new Candidate(raftActorContext); + + assertEquals("getCurrentTerm", expectedTerm+1, raftActorContext.getTermInformation().getCurrentTerm()); + assertEquals("getVotedFor", raftActorContext.getId(), raftActorContext.getTermInformation().getVotedFor()); + } + + @Test + public void testThatAnElectionTimeoutIsTriggered(){ + MockRaftActorContext actorContext = createActorContext(); + candidate = new Candidate(actorContext); + + MessageCollectorActor.expectFirstMatching(candidateActor, ElectionTimeout.class, + actorContext.getConfigParams().getElectionTimeOutInterval().$times(6).toMillis()); + } + + @Test + public void testHandleElectionTimeoutWhenThereAreZeroPeers(){ + RaftActorContext raftActorContext = createActorContext(); + candidate = new Candidate(raftActorContext); + + RaftActorBehavior newBehavior = + candidate.handleMessage(candidateActor, new ElectionTimeout()); + + assertEquals("Behavior", RaftState.Leader, newBehavior.state()); + } + + @Test + public void testHandleElectionTimeoutWhenThereAreTwoNodeCluster(){ + MockRaftActorContext raftActorContext = createActorContext(); + raftActorContext.setPeerAddresses(setupPeers(1)); + candidate = new Candidate(raftActorContext); + + candidate = candidate.handleMessage(candidateActor, new ElectionTimeout()); + + assertEquals("Behavior", RaftState.Candidate, candidate.state()); + } + + @Test + public void testBecomeLeaderOnReceivingMajorityVotesInThreeNodeCluster(){ + MockRaftActorContext raftActorContext = createActorContext(); + raftActorContext.setPeerAddresses(setupPeers(2)); + candidate = new Candidate(raftActorContext); + + candidate = candidate.handleMessage(peerActors[0], new RequestVoteReply(1, true)); + + assertEquals("Behavior", RaftState.Leader, candidate.state()); + } + + @Test + public void testBecomeLeaderOnReceivingMajorityVotesInFiveNodeCluster(){ + MockRaftActorContext raftActorContext = createActorContext(); + raftActorContext.setPeerAddresses(setupPeers(4)); + candidate = new Candidate(raftActorContext); + + // First peers denies the vote. + candidate = candidate.handleMessage(peerActors[0], new RequestVoteReply(1, false)); + + assertEquals("Behavior", RaftState.Candidate, candidate.state()); + + candidate = candidate.handleMessage(peerActors[1], new RequestVoteReply(1, true)); + + assertEquals("Behavior", RaftState.Candidate, candidate.state()); + + candidate = candidate.handleMessage(peerActors[2], new RequestVoteReply(1, true)); + + assertEquals("Behavior", RaftState.Leader, candidate.state()); + } + + @Test + public void testResponseToHandleAppendEntriesWithLowerTerm() { + candidate = new Candidate(createActorContext()); + + setupPeers(1); + candidate.handleMessage(peerActors[0], new AppendEntries(1, "test", 0, 0, + Collections.emptyList(), 0, -1)); + + AppendEntriesReply reply = MessageCollectorActor.expectFirstMatching( + peerActors[0], AppendEntriesReply.class); + assertEquals("isSuccess", false, reply.isSuccess()); + assertEquals("getTerm", 2, reply.getTerm()); + } + + @Test + public void testResponseToRequestVoteWithLowerTerm() { + candidate = new Candidate(createActorContext()); + + setupPeers(1); + candidate.handleMessage(peerActors[0], new RequestVote(1, "test", 0, 0)); + + RequestVoteReply reply = MessageCollectorActor.expectFirstMatching( + peerActors[0], RequestVoteReply.class); + assertEquals("isVoteGranted", false, reply.isVoteGranted()); + assertEquals("getTerm", 2, reply.getTerm()); + } + + @Test + public void testHandleRequestVoteWhenSenderTermEqualToCurrentTermAndVotedForMatches() { + MockRaftActorContext context = createActorContext(); + context.getTermInformation().update(1000, null); + + // Once a candidate is created it will immediately increment the current term so after + // construction the currentTerm should be 1001 + candidate = new Candidate(context); + + setupPeers(1); + candidate.handleMessage(peerActors[0], new RequestVote(1001, context.getId(), 10000, 999)); + + RequestVoteReply reply = MessageCollectorActor.expectFirstMatching( + peerActors[0], RequestVoteReply.class); + assertEquals("isVoteGranted", true, reply.isVoteGranted()); + assertEquals("getTerm", 1001, reply.getTerm()); + } + + @Test + public void testHandleRequestVoteWhenSenderTermEqualToCurrentTermAndVotedForDoesNotMatch() { + MockRaftActorContext context = createActorContext(); + context.getTermInformation().update(1000, null); + + // Once a candidate is created it will immediately increment the current term so after + // construction the currentTerm should be 1001 + candidate = new Candidate(context); + + setupPeers(1); + + // RequestVote candidate ID ("candidate2") does not match this candidate's votedFor + // (it votes for itself) + candidate.handleMessage(peerActors[0], new RequestVote(1001, "candidate2", 10000, 999)); + + RequestVoteReply reply = MessageCollectorActor.expectFirstMatching( + peerActors[0], RequestVoteReply.class); + assertEquals("isVoteGranted", false, reply.isVoteGranted()); + assertEquals("getTerm", 1001, reply.getTerm()); + } + + + + @Override + protected RaftActorBehavior createBehavior(RaftActorContext actorContext) { + return new Candidate(actorContext); + } + + @Override protected MockRaftActorContext createActorContext() { + return new MockRaftActorContext("candidate", getSystem(), candidateActor); + } + + private Map setupPeers(int count) { + Map peerMap = new HashMap<>(); + peerActors = new TestActorRef[count]; + for(int i = 0; i < count; i++) { + peerActors[i] = actorFactory.createTestActor(Props.create(MessageCollectorActor.class), + actorFactory.generateActorId("peer")); + peerMap.put("peer" + (i+1), peerActors[i].path().toString()); + } + + return peerMap; + } + + @Override + protected void assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(RaftActorContext actorContext, + ActorRef actorRef, RaftRPC rpc) throws Exception { + super.assertStateChangesToFollowerWhenRaftRPCHasNewerTerm(actorContext, actorRef, rpc); + assertEquals("New votedFor", null, actorContext.getTermInformation().getVotedFor()); } }