test(batch29): add mapped raft node tests for batching behavior

dotnet/tests/ZB.MOM.NatsNet.Server.Tests/JetStream/RaftNodeTests.cs

@@ -0,0 +1,62 @@
+using Shouldly;
+
+namespace ZB.MOM.NatsNet.Server.Tests.JetStream;
+
+public sealed class RaftNodeTests
+{
+    [Fact]
+    public void NRGMultipleStopsDontPanic_ShouldSucceed()
+    {
+        var raft = InitSingleMemRaftNode();
+
+        Should.NotThrow(() =>
+        {
+            for (var i = 0; i < 10; i++)
+                raft.Stop();
+        });
+
+        raft.State().ShouldBe(RaftState.Closed);
+    }
+
+    [Fact]
+    public void NRGKeepRunningOnServerShutdown_ShouldSucceed()
+    {
+        var raft = InitSingleMemRaftNode();
+
+        raft.Run();
+        raft.State().ShouldBe(RaftState.Follower);
+
+        raft.Stop();
+        raft.WaitForStop();
+
+        raft.State().ShouldBe(RaftState.Closed);
+    }
+
+    [Fact]
+    public void NRGInitSingleMemRaftNodeDefaults_ShouldSucceed()
+    {
+        var raft = InitSingleMemRaftNode();
+
+        raft.ID().ShouldBe("esFhDys3");
+        raft.Peers().Count.ShouldBe(1);
+        raft.Peers()[0].Id.ShouldBe("esFhDys3");
+        raft.ClusterSize().ShouldBe(1);
+        raft.Quorum().ShouldBeTrue();
+    }
+
+    private static Raft InitSingleMemRaftNode()
+    {
+        return new Raft
+        {
+            Id = "esFhDys3",
+            GroupName = "RG",
+            Csz = 1,
+            Qn = 1,
+            Peers_ = new Dictionary<string, Lps>
+            {
+                ["esFhDys3"] = new() { Kp = true, Ts = DateTime.UtcNow },
+            },
+            Quit = System.Threading.Channels.Channel.CreateUnbounded<bool>(),
+        };
+    }
+}