Add XML documentation across gateway, worker, and .NET client

clients/dotnet/MxGateway.Client.Tests/MxGatewayClientSessionTests.cs

@@ -3,8 +3,10 @@ using Grpc.Core;
 
 namespace MxGateway.Client.Tests;
 
+/// <summary>Tests for MxGatewaySession and client command behavior.</summary>
 public sealed class MxGatewayClientSessionTests
 {
+    /// <summary>Verifies that open session attaches API key metadata and cancellation token.</summary>
     [Fact]
     public async Task OpenSessionRawAsync_AttachesApiKeyMetadataAndCancellation()
     {
@@ -19,6 +21,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal(cancellation.Token, call.CallOptions.CancellationToken);
     }
 
+    /// <summary>Verifies that open session returns a session with the raw open reply.</summary>
     [Fact]
     public async Task OpenSessionAsync_ReturnsSessionWithRawOpenReply()
     {
@@ -33,6 +36,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal(1234, session.OpenSessionReply.WorkerProcessId);
     }
 
+    /// <summary>Verifies that register builds a register command and returns server handle.</summary>
     [Fact]
     public async Task RegisterAsync_BuildsRegisterCommandAndReturnsServerHandle()
     {
@@ -57,6 +61,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal("fixture-client", call.Request.Command.Register.ClientName);
     }
 
+    /// <summary>Verifies that add item 2 builds a command with the specified context.</summary>
     [Fact]
     public async Task AddItem2Async_BuildsAddItem2CommandWithContext()
     {
@@ -81,6 +86,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal("runtime", request.Command.AddItem2.ItemContext);
     }
 
+    /// <summary>Verifies that write raw builds a write command with the raw value.</summary>
     [Fact]
     public async Task WriteRawAsync_BuildsWriteCommandWithRawValue()
     {
@@ -111,6 +117,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal(56, request.Command.Write.UserId);
     }
 
+    /// <summary>Verifies that write 2 raw builds a write 2 command with value and timestamp.</summary>
     [Fact]
     public async Task Write2RawAsync_BuildsWrite2CommandWithValueAndTimestamp()
     {
@@ -138,6 +145,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal(56, request.Command.Write2.UserId);
     }
 
+    /// <summary>Verifies that subscribe bulk builds one command and returns per-item results.</summary>
     [Fact]
     public async Task SubscribeBulkAsync_BuildsOneBulkCommandAndReturnsPerItemResults()
     {
@@ -176,6 +184,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal(["Area001.Pump001.Speed"], request.Command.SubscribeBulk.TagAddresses);
     }
 
+    /// <summary>Verifies that stream events yields events in the order received from the gateway.</summary>
     [Fact]
     public async Task StreamEventsAsync_YieldsEventsInGatewayOrder()
     {
@@ -206,6 +215,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal("session-fixture", request.SessionId);
     }
 
+    /// <summary>Verifies that close is explicit and idempotent.</summary>
     [Fact]
     public async Task CloseAsync_IsExplicitAndIdempotent()
     {
@@ -221,6 +231,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal("session-fixture", call.Request.SessionId);
     }
 
+    /// <summary>Verifies that invoke retries safe diagnostic commands on transient RPC failure.</summary>
     [Fact]
     public async Task InvokeAsync_RetriesSafeDiagnosticCommandOnTransientGrpcFailure()
     {
@@ -244,6 +255,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Equal(2, transport.InvokeCalls.Count);
     }
 
+    /// <summary>Verifies that open session does not retry on transient RPC failure.</summary>
     [Fact]
     public async Task OpenSessionAsync_DoesNotRetryTransientGrpcFailure()
     {
@@ -256,6 +268,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Single(transport.OpenSessionCalls);
     }
 
+    /// <summary>Verifies that invoke does not retry write commands on transient RPC failure.</summary>
     [Fact]
     public async Task InvokeAsync_DoesNotRetryWriteCommand()
     {
@@ -270,6 +283,7 @@ public sealed class MxGatewayClientSessionTests
         Assert.Single(transport.InvokeCalls);
     }
 
+    /// <summary>Verifies that invoke helpers pass cancellation token to the transport.</summary>
     [Fact]
     public async Task InvokeHelpers_PassCancellationTokenToTransport()
     {