Joseph Doherty
105 lines
4.0 KiB
C#
105 lines
4.0 KiB
C#
using Akka.Actor;
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using Akka.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging.Abstractions;
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using Microsoft.Extensions.Options;
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using ZB.MOM.WW.ScadaBridge.ClusterInfrastructure;
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using ZB.MOM.WW.ScadaBridge.Communication;
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using ZB.MOM.WW.ScadaBridge.Host.Actors;
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using ZB.MOM.WW.ScadaBridge.Host.Health;
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namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
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public class ClusterActivityEvaluatorTests : IAsyncLifetime
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{
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private ActorSystem? _system;
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public async Task InitializeAsync()
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{
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var port = FreePort();
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var config = ConfigurationFactory.ParseString($@"
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akka {{
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actor.provider = cluster
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remote.dot-netty.tcp {{ hostname = ""127.0.0.1"", port = {port} }}
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cluster {{
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seed-nodes = [""akka.tcp://eval-test@127.0.0.1:{port}""]
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roles = [""Central""]
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min-nr-of-members = 1
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}}
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}}");
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_system = ActorSystem.Create("eval-test", config);
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var cluster = Akka.Cluster.Cluster.Get(_system);
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var deadline = DateTime.UtcNow.AddSeconds(20);
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while (cluster.SelfMember.Status != Akka.Cluster.MemberStatus.Up && DateTime.UtcNow < deadline)
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await Task.Delay(100);
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}
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public async Task DisposeAsync() { if (_system != null) await _system.Terminate(); }
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[Fact]
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public void SelfIsOldest_SoleUpMember_ReturnsTrue()
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{
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var cluster = Akka.Cluster.Cluster.Get(_system!);
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Assert.True(ClusterActivityEvaluator.SelfIsOldest(cluster));
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Assert.True(ClusterActivityEvaluator.SelfIsOldest(cluster, "Central"));
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}
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[Fact]
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public void SelfIsOldest_RoleNotHeld_ReturnsFalse()
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{
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var cluster = Akka.Cluster.Cluster.Get(_system!);
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// Self doesn't carry the role => it can never host that role's singletons.
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Assert.False(ClusterActivityEvaluator.SelfIsOldest(cluster, "site-nonexistent"));
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}
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[Fact]
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public async Task ActiveNodeGate_And_NodeProvider_AgreeWithEvaluator()
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{
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// Both product gates must be backed by the oldest-member evaluator.
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// A single-node Up cluster: evaluator says true, so both must say true.
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// (Pinning test — the leader==oldest divergence is proven in Task 8's
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// two-node integration test; here we assert the wiring holds.)
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var port = FreePort();
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var self = $"akka.tcp://scadabridge@127.0.0.1:{port}";
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var akkaService = new AkkaHostedService(
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new ServiceCollection().BuildServiceProvider(),
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Options.Create(new NodeOptions { Role = "Central", NodeHostname = "127.0.0.1", RemotingPort = port }),
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Options.Create(new ClusterOptions
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{
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SeedNodes = new List<string> { self },
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SplitBrainResolverStrategy = "keep-oldest",
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StableAfter = TimeSpan.FromSeconds(3),
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HeartbeatInterval = TimeSpan.FromMilliseconds(500),
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FailureDetectionThreshold = TimeSpan.FromSeconds(2),
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MinNrOfMembers = 1,
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DownIfAlone = true,
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}),
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Options.Create(new CommunicationOptions()),
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NullLogger<AkkaHostedService>.Instance);
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var system = akkaService.GetOrCreateActorSystem();
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try
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{
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var cluster = Akka.Cluster.Cluster.Get(system);
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var deadline = DateTime.UtcNow.AddSeconds(20);
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while (cluster.SelfMember.Status != Akka.Cluster.MemberStatus.Up && DateTime.UtcNow < deadline)
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await Task.Delay(100);
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var gate = new ActiveNodeGate(akkaService);
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var provider = new AkkaClusterNodeProvider(akkaService, "Central");
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Assert.True(gate.IsActiveNode);
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Assert.True(provider.SelfIsPrimary);
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}
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finally
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{
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await system.Terminate();
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}
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}
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private static int FreePort()
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{
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var l = new System.Net.Sockets.TcpListener(System.Net.IPAddress.Loopback, 0);
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l.Start(); var p = ((System.Net.IPEndPoint)l.LocalEndpoint).Port; l.Stop(); return p;
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}
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}
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