Files
raft-fable/Raft.Test/TestServer.fs
2022-10-24 22:11:12 +01:00

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namespace Raft.Test
open System.Threading
open Raft
open NUnit.Framework
open FsUnitTyped
[<TestFixture>]
module TestServer =
[<Test>]
let foo () =
let cluster = InMemoryCluster.make<int> 5
let logger, logs =
let logs = ResizeArray ()
let logLine (s : string) = lock logs (fun () -> logs.Add s)
let freezeLogs () =
lock logs (fun () -> logs |> Seq.toList)
logLine, freezeLogs
let sendMessage = cluster.Servers.[0].OutboundMessageChannel
// Candidate 1 asks server 0 to vote for it.
{
CandidateTerm = 0<Term>
CandidateId = 1<ServerId>
ReplyChannel = fun message -> logger (sprintf "Received message for term %i" message.VoterTerm)
CandidateLastLogEntry = 0<LogIndex>, 0<Term>
}
|> Message.RequestVote
|> sendMessage 0<ServerId>
logs () |> shouldEqual [ "Received message for term 0" ]
// Candidate 1 asks to be elected again! This is fine, maybe the network is replaying requests
// and the network swallowed our reply, so we should reply in the same way.
{
CandidateTerm = 0<Term>
CandidateId = 1<ServerId>
ReplyChannel = fun message -> logger (sprintf "Received message for term %i" message.VoterTerm)
CandidateLastLogEntry = 0<LogIndex>, 0<Term>
}
|> Message.RequestVote
|> sendMessage 0<ServerId>
logs ()
|> shouldEqual [ "Received message for term 0" ; "Received message for term 0" ]
// Candidate 2 asks to be elected. We won't vote for them, because we've already voted.
// and the network swallowed our reply, so we should reply in the same way.
let calls = ref 0
{
CandidateTerm = 0<Term>
CandidateId = 2<ServerId>
ReplyChannel = fun _ -> Interlocked.Increment calls |> ignore
CandidateLastLogEntry = 0<LogIndex>, 0<Term>
}
|> Message.RequestVote
|> sendMessage 0<ServerId>
calls.Value |> shouldEqual 0