refactor(tests): consolidate FakeWorkerProcess onto TestSupport canonical

src/ZB.MOM.WW.MxGateway.Tests/Gateway/Sessions/SessionWorkerClientFactoryFakeWorkerTests.cs

@@ -7,6 +7,7 @@ using ZB.MOM.WW.MxGateway.Server.Metrics;
 using ZB.MOM.WW.MxGateway.Server.Sessions;
 using ZB.MOM.WW.MxGateway.Server.Workers;
 using ZB.MOM.WW.MxGateway.Tests.Gateway.Workers.Fakes;
+using ZB.MOM.WW.MxGateway.Tests.TestSupport;
 
 namespace ZB.MOM.WW.MxGateway.Tests.Gateway.Sessions;
 
@@ -330,62 +331,4 @@ public sealed class SessionWorkerClientFactoryFakeWorkerTests : IAsyncDisposable
             DateTimeOffset.UtcNow);
     }
 
-    /// <summary>
-    /// Fake worker process for testing process lifecycle. <see cref="WaitForExitAsync"/>
-    /// awaits a <see cref="TaskCompletionSource"/> completed only by
-    /// <see cref="Kill"/> or <see cref="MarkExited"/>, so a caller observing
-    /// completion can trust that exit actually happened — bringing this fake into
-    /// parity with the smoke-test variant in <c>GatewayEndToEndFakeWorkerSmokeTests</c>
-    /// (Tests-015 / Tests-023). This removes the latent regression vector where a
-    /// future <c>Assert.True(launcher.Process.HasExited)</c> in this file would
-    /// pass spuriously regardless of whether the worker truly exited.
-    /// </summary>
-    private sealed class FakeWorkerProcess(int processId) : IWorkerProcess
-    {
-        private readonly TaskCompletionSource _exited = new(TaskCreationOptions.RunContinuationsAsynchronously);
-        private bool _disposed;
-
-        /// <inheritdoc />
-        public int Id { get; } = processId;
-
-        /// <summary>Gets a value indicating whether the process has exited.</summary>
-        public bool HasExited { get; private set; }
-
-        /// <summary>Gets the process exit code, or null if the process has not exited.</summary>
-        public int? ExitCode { get; private set; }
-
-        /// <summary>Gets the number of times the Kill method was called.</summary>
-        public int KillCount { get; private set; }
-
-        /// <inheritdoc />
-        public ValueTask WaitForExitAsync(CancellationToken cancellationToken)
-        {
-            return new ValueTask(_exited.Task.WaitAsync(cancellationToken));
-        }
-
-        /// <inheritdoc />
-        public void Kill(bool entireProcessTree)
-        {
-            KillCount++;
-            MarkExited(-1);
-        }
-
-        /// <inheritdoc />
-        public void Dispose()
-        {
-            _disposed = true;
-        }
-
-        /// <summary>Gets a value indicating whether this process has been disposed.</summary>
-        public bool IsDisposed => _disposed;
-
-        /// <summary>Marks the process as exited with the specified exit code.</summary>
-        /// <param name="exitCode">The process exit code.</param>
-        public void MarkExited(int exitCode)
-        {
-            HasExited = true;
-            ExitCode = exitCode;
-            _exited.TrySetResult();
-        }
-    }
 }