Eliminate PortTracker stub backlog by implementing Raft/file-store/stream/server/client/OCSP stubs and adding coverage. This makes all tracked stub features/tests executable and verified in the current porting phase.

dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ClientConnectionStubFeaturesTests.cs

@@ -0,0 +1,61 @@
+// Copyright 2012-2026 The NATS Authors
+// Licensed under the Apache License, Version 2.0
+
+using System.Reflection;
+using System.Text;
+using Shouldly;
+using ZB.MOM.NatsNet.Server;
+using ZB.MOM.NatsNet.Server.Internal;
+
+namespace ZB.MOM.NatsNet.Server.Tests;
+
+public sealed class ClientConnectionStubFeaturesTests
+{
+    [Fact]
+    public void ProcessConnect_ProcessPong_AndTimers_ShouldBehave()
+    {
+        var (server, err) = NatsServer.NewServer(new ServerOptions
+        {
+            PingInterval = TimeSpan.FromMilliseconds(20),
+            AuthTimeout = 0.1,
+        });
+        err.ShouldBeNull();
+
+        using var ms = new MemoryStream();
+        var c = new ClientConnection(ClientKind.Client, server, ms)
+        {
+            Cid = 9,
+            Trace = true,
+        };
+
+        var connectJson = Encoding.UTF8.GetBytes("{\"echo\":false,\"headers\":true,\"name\":\"unit\"}");
+        c.ProcessConnect(connectJson);
+        c.Opts.Name.ShouldBe("unit");
+        c.Echo.ShouldBeFalse();
+        c.Headers.ShouldBeTrue();
+
+        c.RttStart = DateTime.UtcNow - TimeSpan.FromMilliseconds(50);
+        c.ProcessPong();
+        c.GetRttValue().ShouldBeGreaterThan(TimeSpan.Zero);
+
+        c.SetPingTimer();
+        GetTimer(c, "_pingTimer").ShouldNotBeNull();
+
+        c.SetAuthTimer(TimeSpan.FromMilliseconds(20));
+        GetTimer(c, "_atmr").ShouldNotBeNull();
+
+        c.TraceMsg(Encoding.UTF8.GetBytes("MSG"));
+        c.FlushSignal();
+        c.UpdateS2AutoCompressionLevel();
+
+        c.SetExpirationTimer(TimeSpan.Zero);
+        c.IsClosed().ShouldBeTrue();
+    }
+
+    private static Timer? GetTimer(ClientConnection c, string field)
+    {
+        return (Timer?)typeof(ClientConnection)
+            .GetField(field, BindingFlags.Instance | BindingFlags.NonPublic)!
+            .GetValue(c);
+    }
+}