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/Accounts/ResolverDefaultsOpsTests.cs

@@ -0,0 +1,62 @@
+// Copyright 2012-2026 The NATS Authors
+// Licensed under the Apache License, Version 2.0
+
+using System.Reflection;
+using Shouldly;
+using ZB.MOM.NatsNet.Server;
+using ZB.MOM.NatsNet.Server.Internal;
+
+namespace ZB.MOM.NatsNet.Server.Tests.Accounts;
+
+public sealed class ResolverDefaultsOpsTests
+{
+    [Fact]
+    public async Task ResolverDefaults_StartReloadClose_ShouldBeNoOps()
+    {
+        var resolver = new DummyResolver();
+
+        resolver.IsReadOnly().ShouldBeTrue();
+        resolver.IsTrackingUpdate().ShouldBeFalse();
+
+        resolver.Start(new object());
+        resolver.Reload();
+        resolver.Close();
+
+        var jwt = await resolver.FetchAsync("A");
+        jwt.ShouldBe("jwt");
+
+        await Should.ThrowAsync<NotSupportedException>(() => resolver.StoreAsync("A", "jwt"));
+    }
+
+    [Fact]
+    public void UpdateLeafNodes_SubscriptionDelta_ShouldUpdateMaps()
+    {
+        var acc = new Account { Name = "A" };
+        var sub = new Subscription
+        {
+            Subject = System.Text.Encoding.UTF8.GetBytes("foo"),
+            Queue = System.Text.Encoding.UTF8.GetBytes("q"),
+            Qw = 2,
+        };
+
+        acc.UpdateLeafNodes(sub, 1);
+
+        var rm = (Dictionary<string, int>?)typeof(Account)
+            .GetField("_rm", BindingFlags.Instance | BindingFlags.NonPublic)!
+            .GetValue(acc);
+        rm.ShouldNotBeNull();
+        rm!["foo"].ShouldBe(1);
+
+        var lqws = (Dictionary<string, int>?)typeof(Account)
+            .GetField("_lqws", BindingFlags.Instance | BindingFlags.NonPublic)!
+            .GetValue(acc);
+        lqws.ShouldNotBeNull();
+        lqws!["foo q"].ShouldBe(2);
+    }
+
+    private sealed class DummyResolver : ResolverDefaultsOps
+    {
+        public override Task<string> FetchAsync(string name, CancellationToken ct = default)
+            => Task.FromResult("jwt");
+    }
+}