public void should_select_valid_best_leader_candidate(TestCase tc)
{
var epochId = Guid.NewGuid();
var members = new MemberInfo[3];
var prepareOks = new Dictionary <Guid, ElectionMessage.PrepareOk>();
Func <int, long> writerCheckpoint = i => tc.WriterCheckpoints[i];
Func <int, long> chaserCheckpoint = i => tc.ChaserCheckpoints[i];
Func <int, int> nodePriority = i => tc.NodePriorities[i];
Func <int, int> epochNumber = i => tc.EpochNumbers[i];
for (int index = 0; index < 3; index++)
{
members[index] = CreateMemberInfo(index, epochId, writerCheckpoint,
chaserCheckpoint, nodePriority, epochNumber);
}
var clusterInfo = new ClusterInfo(members);
Func <int, Guid> previousLeaderId = i => !tc.LastElectedLeader[i].HasValue ? Guid.Empty : IdForNode(tc.LastElectedLeader[i].Value);
for (int index = 0; index < 3; index++)
{
var prepareOk = CreatePrepareOk(index, epochId, writerCheckpoint, chaserCheckpoint,
nodePriority, epochNumber, previousLeaderId, clusterInfo);
prepareOks.Add(prepareOk.ServerId, prepareOk);
}
//var lastElectedLeader = tc.LastElectedLeader.HasValue
// ? (Guid?)IdForNode(tc.LastElectedLeader.Value)
// : null;
var resigningLeadership = tc.ResigningLeader.HasValue
? (Guid?)IdForNode(tc.ResigningLeader.Value)
: null;
var mc = SUT.GetBestLeaderCandidate(prepareOks, members, resigningLeadership, 0);
Assert.AreEqual(IdForNode(tc.ExpectedLeaderCandidateNode), mc.InstanceId, $"Expected node {tc.ExpectedLeaderCandidateNode} got node {Array.FindIndex(members, 0, m => m.InstanceId == mc.InstanceId) + 1 }");
var ownInfo = CreateLeaderCandidate(1, epochId, writerCheckpoint, chaserCheckpoint,
nodePriority, epochNumber, previousLeaderId);
var isLegit = SUT.IsLegitimateLeader(1, EndpointForNode(tc.ProposingNode),
IdForNode(tc.ProposingNode), mc, members, null, members[0].InstanceId,
ownInfo, resigningLeadership);
Assert.True(isLegit);
}
public void should_select_valid_best_leader_candidate(TestCase tc)
{
var epochId = Guid.NewGuid();
var members = new MemberInfo[3];
var prepareOks = new Dictionary <Guid, ElectionMessage.PrepareOk>();
Func <int, long> lastCommitPosition = i => tc.CommitPositions[i];
Func <int, long> writerCheckpoint = i => tc.WriterCheckpoints[i];
Func <int, long> chaserCheckpoint = i => tc.ChaserCheckpoints[i];
Func <int, int> nodePriority = i => tc.NodePriorities[i];
for (int index = 0; index < 3; index++)
{
members[index] = CreateMemberInfo(index, epochId, lastCommitPosition, writerCheckpoint,
chaserCheckpoint, nodePriority);
var prepareOk = CreatePrepareOk(index, epochId, lastCommitPosition, writerCheckpoint, chaserCheckpoint,
nodePriority);
prepareOks.Add(prepareOk.ServerId, prepareOk);
}
var lastElectedLeader = tc.LastElectedLeader.HasValue
? (Guid?)IdForNode(tc.LastElectedLeader.Value)
: null;
var resigningLeadership = tc.ResigningLeader.HasValue
? (Guid?)IdForNode(tc.ResigningLeader.Value)
: null;
var mc = SUT.GetBestLeaderCandidate(prepareOks, members, lastElectedLeader, resigningLeadership);
Assert.AreEqual(IdForNode(tc.ExpectedLeaderCandidateNode), mc.InstanceId);
var ownInfo = CreateLeaderCandidate(1, epochId, lastCommitPosition, writerCheckpoint, chaserCheckpoint,
nodePriority);
var localNode = FromMember(0, members);
var isLegit = SUT.IsLegitimateLeader(1, EndpointForNode(tc.ProposingNode),
IdForNode(tc.ProposingNode), mc, members, null, localNode,
ownInfo, resigningLeadership);
Assert.True(isLegit);
}