fix(communication): resolve Communication-004..008 — Resume supervision, gRPC option wiring, address-load logging, sync dispose, flap detection

tests/ScadaLink.Communication.Tests/Grpc/GrpcOptionsWiringTests.cs

@@ -0,0 +1,67 @@
+using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Options;
+using NSubstitute;
+using ScadaLink.Communication;
+using ScadaLink.Communication.Grpc;
+
+namespace ScadaLink.Communication.Tests.Grpc;
+
+/// <summary>
+/// Regression tests for Communication-005 — the gRPC keepalive and
+/// max-stream-lifetime / max-concurrent-stream options defined on
+/// <see cref="CommunicationOptions"/> must actually be applied to the
+/// gRPC client and server rather than hard-coded.
+/// </summary>
+public class GrpcOptionsWiringTests
+{
+    [Fact]
+    public void SiteStreamGrpcClient_AppliesKeepAliveFromOptions()
+    {
+        var options = new CommunicationOptions
+        {
+            GrpcKeepAlivePingDelay = TimeSpan.FromSeconds(42),
+            GrpcKeepAlivePingTimeout = TimeSpan.FromSeconds(7)
+        };
+
+        var client = new SiteStreamGrpcClient(
+            "http://localhost:9999", NullLogger<SiteStreamGrpcClient>.Instance, options);
+
+        Assert.Equal(TimeSpan.FromSeconds(42), client.KeepAlivePingDelay);
+        Assert.Equal(TimeSpan.FromSeconds(7), client.KeepAlivePingTimeout);
+    }
+
+    [Fact]
+    public void SiteStreamGrpcClientFactory_FlowsOptionsToCreatedClients()
+    {
+        var options = new CommunicationOptions
+        {
+            GrpcKeepAlivePingDelay = TimeSpan.FromSeconds(33),
+            GrpcKeepAlivePingTimeout = TimeSpan.FromSeconds(11)
+        };
+
+        using var factory = new SiteStreamGrpcClientFactory(
+            NullLoggerFactory.Instance, Options.Create(options));
+
+        var client = factory.GetOrCreate("site1", "http://localhost:9999");
+
+        Assert.Equal(TimeSpan.FromSeconds(33), client.KeepAlivePingDelay);
+        Assert.Equal(TimeSpan.FromSeconds(11), client.KeepAlivePingTimeout);
+    }
+
+    [Fact]
+    public void SiteStreamGrpcServer_BindsMaxConcurrentStreamsAndLifetimeFromOptions()
+    {
+        var options = new CommunicationOptions
+        {
+            GrpcMaxConcurrentStreams = 250,
+            GrpcMaxStreamLifetime = TimeSpan.FromHours(2)
+        };
+
+        var subscriber = Substitute.For<ISiteStreamSubscriber>();
+        var server = new SiteStreamGrpcServer(
+            subscriber, NullLogger<SiteStreamGrpcServer>.Instance, Options.Create(options));
+
+        Assert.Equal(250, server.MaxConcurrentStreams);
+        Assert.Equal(TimeSpan.FromHours(2), server.MaxStreamLifetime);
+    }
+}