Implement worker register and unregister

src/MxGateway.Worker.Tests/MxAccess/MxAccessLiveComCreationTests.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Threading.Tasks;
+using MxGateway.Contracts.Proto;
 using MxGateway.Worker.MxAccess;
+using MxGateway.Worker.Sta;
 
 namespace MxGateway.Worker.Tests.MxAccess;
 
@@ -21,4 +23,53 @@ public sealed class MxAccessLiveComCreationTests
 
         await session.StartAsync(workerProcessId: 1234);
     }
+
+    [Fact]
+    public async Task RegisterAndUnregister_WhenOptedIn_RoundTripsInstalledMxAccessServerHandle()
+    {
+        if (!RunLiveMxAccessTests())
+        {
+            return;
+        }
+
+        using MxAccessStaSession session = new();
+        await session.StartAsync(workerProcessId: 1234);
+
+        MxCommandReply registerReply = await session.DispatchAsync(new StaCommand(
+            "session-1",
+            "live-register",
+            new MxCommand
+            {
+                Kind = MxCommandKind.Register,
+                Register = new RegisterCommand
+                {
+                    ClientName = "MxGateway.Worker.Tests",
+                },
+            }));
+
+        Assert.Equal(ProtocolStatusCode.Ok, registerReply.ProtocolStatus.Code);
+        Assert.True(registerReply.Register.ServerHandle > 0);
+
+        MxCommandReply unregisterReply = await session.DispatchAsync(new StaCommand(
+            "session-1",
+            "live-unregister",
+            new MxCommand
+            {
+                Kind = MxCommandKind.Unregister,
+                Unregister = new UnregisterCommand
+                {
+                    ServerHandle = registerReply.Register.ServerHandle,
+                },
+            }));
+
+        Assert.Equal(ProtocolStatusCode.Ok, unregisterReply.ProtocolStatus.Code);
+    }
+
+    private static bool RunLiveMxAccessTests()
+    {
+        return string.Equals(
+            Environment.GetEnvironmentVariable("MXGATEWAY_RUN_LIVE_MXACCESS_TESTS"),
+            "1",
+            StringComparison.Ordinal);
+    }
 }