refactor: extract NATS.Server.LeafNodes.Tests project

Move 28 leaf node test files from NATS.Server.Tests into a dedicated NATS.Server.LeafNodes.Tests project. Update namespaces, add InternalsVisibleTo, register in solution file. Replace all Task.Delay polling loops with PollHelper.WaitUntilAsync/YieldForAsync from TestUtilities. Replace private ReadUntilAsync in LeafProtocolTests with SocketTestHelper.ReadUntilAsync. All 281 tests pass.
2026-03-12 15:23:33 -04:00
parent 9972b74bc3
commit 3f7d896a34
31 changed files with 132 additions and 243 deletions
--- a/tests/NATS.Server.LeafNodes.Tests/LeafAdvancedSemanticsTests.cs
+++ b/tests/NATS.Server.LeafNodes.Tests/LeafAdvancedSemanticsTests.cs
@@ -0,0 +1,70 @@
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using NATS.Server.LeafNodes;
+using NATS.Server.Subscriptions;
+
+namespace NATS.Server.LeafNodes.Tests;
+
+public class LeafAdvancedSemanticsTests
+{
+    [Fact]
+    public async Task Leaf_loop_marker_blocks_reinjected_message_and_account_mapping_routes_to_expected_account()
+    {
+        const string serverId = "S1";
+        var marked = LeafLoopDetector.Mark("orders.created", serverId);
+        LeafLoopDetector.IsLooped(marked, serverId).ShouldBeTrue();
+        LeafLoopDetector.IsLooped(marked, "S2").ShouldBeFalse();
+        LeafLoopDetector.TryUnmark(marked, out var unmarked).ShouldBeTrue();
+        unmarked.ShouldBe("orders.created");
+
+        using var listener = new TcpListener(IPAddress.Loopback, 0);
+        listener.Start();
+        var port = ((IPEndPoint)listener.LocalEndpoint).Port;
+
+        using var remoteSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+        await remoteSocket.ConnectAsync(IPAddress.Loopback, port);
+        using var leafSocket = await listener.AcceptSocketAsync();
+        await using var leaf = new LeafConnection(leafSocket);
+
+        using var timeout = new CancellationTokenSource(TimeSpan.FromSeconds(5));
+        var handshakeTask = leaf.PerformOutboundHandshakeAsync("LOCAL", timeout.Token);
+        (await ReadLineAsync(remoteSocket, timeout.Token)).ShouldBe("LEAF LOCAL");
+        await WriteLineAsync(remoteSocket, "LEAF REMOTE", timeout.Token);
+        await handshakeTask;
+
+        var received = new TaskCompletionSource<RemoteSubscription>(TaskCreationOptions.RunContinuationsAsynchronously);
+        leaf.RemoteSubscriptionReceived = sub =>
+        {
+            received.TrySetResult(sub);
+            return Task.CompletedTask;
+        };
+        leaf.StartLoop(timeout.Token);
+
+        await WriteLineAsync(remoteSocket, "LS+ ACC_A leaf.>", timeout.Token);
+        var lsPlus = await received.Task.WaitAsync(timeout.Token);
+        lsPlus.Account.ShouldBe("ACC_A");
+        lsPlus.Subject.ShouldBe("leaf.>");
+    }
+
+    private static async Task<string> ReadLineAsync(Socket socket, CancellationToken ct)
+    {
+        var bytes = new List<byte>(64);
+        var single = new byte[1];
+        while (true)
+        {
+            var read = await socket.ReceiveAsync(single, SocketFlags.None, ct);
+            if (read == 0)
+                break;
+            if (single[0] == (byte)'\n')
+                break;
+            if (single[0] != (byte)'\r')
+                bytes.Add(single[0]);
+        }
+
+        return Encoding.ASCII.GetString([.. bytes]);
+    }
+
+    private static Task WriteLineAsync(Socket socket, string line, CancellationToken ct)
+        => socket.SendAsync(Encoding.ASCII.GetBytes($"{line}\r\n"), SocketFlags.None, ct).AsTask();
+}