fix(comm): shared oldest-Up ActiveNodeEvaluator in Communication; Host evaluator delegates (plan R2-02 T1)

2026-07-13 09:43:22 -04:00
parent 1429ddaa0e
commit 91209070d0
3 changed files with 102 additions and 14 deletions
@@ -0,0 +1,57 @@
+using System.Net;
+using System.Net.Sockets;
+using Akka.Actor;
+using Akka.Configuration;
+using Xunit;
+using ZB.MOM.WW.ScadaBridge.Communication.ClusterState;
+
+namespace ZB.MOM.WW.ScadaBridge.Communication.Tests;
+
+public class ActiveNodeEvaluatorTests : IAsyncLifetime
+{
+    private ActorSystem? _system;
+
+    public async Task InitializeAsync()
+    {
+        var port = FreePort();
+        var config = ConfigurationFactory.ParseString($@"
+akka {{
+    actor.provider = cluster
+    remote.dot-netty.tcp {{ hostname = ""127.0.0.1"", port = {port} }}
+    cluster {{
+        seed-nodes = [""akka.tcp://ane-test@127.0.0.1:{port}""]
+        roles = [""site-x""]
+        min-nr-of-members = 1
+    }}
+}}");
+        _system = ActorSystem.Create("ane-test", config);
+        var cluster = Akka.Cluster.Cluster.Get(_system);
+        var deadline = DateTime.UtcNow.AddSeconds(20);
+        while (cluster.SelfMember.Status != Akka.Cluster.MemberStatus.Up && DateTime.UtcNow < deadline)
+            await Task.Delay(100);
+    }
+
+    public async Task DisposeAsync() { if (_system != null) await _system.Terminate(); }
+
+    [Fact]
+    public void SelfIsOldestUp_SoleUpMember_ReturnsTrue()
+    {
+        var cluster = Akka.Cluster.Cluster.Get(_system!);
+        Assert.True(ActiveNodeEvaluator.SelfIsOldestUp(cluster));
+        Assert.True(ActiveNodeEvaluator.SelfIsOldestUp(cluster, "site-x"));
+    }
+
+    [Fact]
+    public void SelfIsOldestUp_RoleNotHeld_ReturnsFalse()
+    {
+        var cluster = Akka.Cluster.Cluster.Get(_system!);
+        Assert.False(ActiveNodeEvaluator.SelfIsOldestUp(cluster, "role-nonexistent"));
+    }
+
+    private static int FreePort()
+    {
+        using var l = new TcpListener(IPAddress.Loopback, 0);
+        l.Start();
+        return ((IPEndPoint)l.LocalEndpoint).Port;
+    }
+}