Fixes #4804. Unit Tests are not running in degraded mode

Terminal.Gui/App/Clipboard/ClipboardProcessRunner.cs

@@ -31,7 +31,7 @@ public static (int exitCode, string result) Process (
     {
         var output = string.Empty;
 
-        if (Console.IsInputRedirected || Console.IsOutputRedirected)
+        if (DriverImpl.DisableDriverRealIO)
         {
             return (-1, output);
         }

Terminal.Gui/Drivers/AnsiDriver/AnsiInput.cs

@@ -88,9 +88,9 @@ public AnsiInput ()
         try
         {
             // Check if we have a real console first
-            if (!AnsiTerminalHelper.IsAttachedToTerminal (out bool inputAttached, out bool outputAttached))
+            if (DriverImpl.DisableDriverRealIO)
             {
-                Trace.Lifecycle (nameof (AnsiInput), "Init", $"Console redirected (Output: {outputAttached}, Input: {inputAttached}). Running in degraded mode.");
+                Trace.Lifecycle (nameof (AnsiInput), "Init", "Console is running unit tests. Running in degraded mode.");
 
                 return;
             }

Terminal.Gui/Drivers/AnsiDriver/AnsiOutput.cs

@@ -37,7 +37,7 @@ namespace Terminal.Gui.Drivers;
 public class AnsiOutput : OutputBase, IOutput
 {
     // Tracks which underlying platform APIs are in use
-    private readonly AnsiPlatform _platform;
+    internal readonly AnsiPlatform _platform;
 
     private Size _consoleSize = new (80, 25);
     private IOutputBuffer? _lastBuffer;
@@ -61,9 +61,9 @@ public AnsiOutput ()
         try
         {
             // Check if we have a real console first
-            if (!AnsiTerminalHelper.IsAttachedToTerminal (out bool inputAttached, out bool outputAttached))
+            if (DriverImpl.DisableDriverRealIO)
             {
-                Trace.Lifecycle (nameof (AnsiOutput), "Init", $"Console redirected (Output: {outputAttached}, Input: {inputAttached}). Running in degraded mode.");
+                Trace.Lifecycle (nameof (AnsiOutput), "Init", "Console is running unit tests. Running in degraded mode.");
 
                 return;
             }

Terminal.Gui/Drivers/DotNetDriver/NetOutput.cs

@@ -37,7 +37,7 @@ public Size GetSize ()
     {
         try
         {
-            if (Console.IsInputRedirected || Console.IsOutputRedirected)
+            if (DriverImpl.DisableDriverRealIO)
             {
                 return new Size (80, 25);
             }
@@ -176,7 +176,7 @@ public void Suspend ()
             Write (EscSeqUtils.CSI_DisableMouseEvents);
 
             // Check if we have a real console first
-            if (Console.IsInputRedirected || Console.IsOutputRedirected)
+            if (DriverImpl.DisableDriverRealIO)
             {
                 Logging.Information ($"Console redirected (Output: {Console.IsOutputRedirected}, Input: {Console.IsInputRedirected}). Running in degraded mode.");
 

Terminal.Gui/Drivers/DriverImpl.cs

@@ -62,6 +62,27 @@ public DriverImpl (IComponentFactory componentFactory,
 
     #region Driver Lifecycle
 
+    /// <summary>
+    ///     Determines whether the current execution context is within a unit test project.
+    /// </summary>
+    /// <remarks>
+    ///     This method leverages <see cref="AppContext"/> switches to ensure compatibility with
+    ///     <b>Native AOT</b> and avoids trimming-related issues associated with reflection.
+    ///     <para>
+    ///         For this to return <c>true</c>, the test project (e.g., xUnit v3) must define the
+    ///         switch in its <c>.csproj</c> file:
+    ///         <code>
+    /// &lt;ItemGroup&gt;
+    ///   &lt;RuntimeHostConfigurationOption Include="Runtime.IsTestProject" Value="true" Trim="false" /&gt;
+    /// &lt;/ItemGroup&gt;
+    /// </code>
+    ///     </para>
+    /// </remarks>
+    /// <returns>
+    ///     <see langword="true"/> if the test execution flag is set; otherwise, <see langword="false"/>.
+    /// </returns>
+    public static bool DisableDriverRealIO => AppContext.TryGetSwitch ("Runtime.IsTestProject", out bool isTest) && isTest;
+
     /// <inheritdoc/>
     public void Init () => throw new NotSupportedException ();
 

Terminal.Gui/Drivers/Input/TestInputSource.cs

@@ -11,7 +11,7 @@ public class TestInputSource : IInputSource
     ///     Initializes a new instance of the <see cref="TestInputSource"/> class.
     /// </summary>
     /// <param name="timeProvider">The time provider for timestamps.</param>
-    public TestInputSource (ITimeProvider timeProvider) { TimeProvider = timeProvider; }
+    public TestInputSource (ITimeProvider timeProvider) => TimeProvider = timeProvider;
 
     /// <inheritdoc/>
     public ITimeProvider TimeProvider { get; }

Terminal.Gui/Drivers/UnixDriver/UnixTerminalHelper.cs

@@ -101,9 +101,9 @@ public static void Suspend (IOutput output)
             output.Write (EscSeqUtils.CSI_DisableMouseEvents);
 
             // Check if we have a real console first
-            if (!AnsiTerminalHelper.IsAttachedToTerminal (out bool inputAttached, out bool outputAttached))
+            if (DriverImpl.DisableDriverRealIO)
             {
-                Trace.Lifecycle (nameof (UnixTerminalHelper), "Suspend", $"Console redirected (Output: {outputAttached}, Input: {inputAttached}). Running in degraded mode.");
+                Trace.Lifecycle (nameof (UnixTerminalHelper), "Suspend", "Console is running unit tests. Running in degraded mode.");
 
                 return;
             }

Tests/IntegrationTests/IntegrationTests.csproj

@@ -20,7 +20,14 @@
         <Optimize>true</Optimize>
     </PropertyGroup>
 
-    <ItemGroup>
+		<ItemGroup>
+			<RuntimeHostConfigurationOption
+				Include="Runtime.IsTestProject"
+				Value="true"
+				Trim="false" />
+		</ItemGroup>
+
+		<ItemGroup>
         <PackageReference Include="coverlet.collector">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

Tests/StressTests/StressTests.csproj

@@ -12,8 +12,15 @@
 	    <ImplicitUsings>enable</ImplicitUsings>
 	    <NoLogo>true</NoLogo>
 	    <SuppressNETCoreSdkPreviewMessage>true</SuppressNETCoreSdkPreviewMessage>
-
     </PropertyGroup>
+
+		<ItemGroup>
+			<RuntimeHostConfigurationOption
+				Include="Runtime.IsTestProject"
+				Value="true"
+				Trim="false" />
+		</ItemGroup>
+
 	<PropertyGroup Condition="'$(Configuration)'=='Debug'">
 		<DefineDebug>true</DefineDebug>
 		<DefineConstants>$(DefineConstants);DEBUG_IDISPOSABLE</DefineConstants>

Tests/UnitTests/UnitTests.csproj

@@ -30,7 +30,15 @@
 	<PropertyGroup Condition="'$(Configuration)'=='Release'">
 		<Optimize>true</Optimize>
 	</PropertyGroup>
+
 	<ItemGroup>
+		<RuntimeHostConfigurationOption
+			Include="Runtime.IsTestProject"
+			Value="true"
+			Trim="false" />
+	</ItemGroup>
+
+  <ItemGroup>
 	  <Compile Remove="Application\Keyboard\**" />
 	  <Compile Remove="Drivers\**" />
 	  <EmbeddedResource Remove="Application\Keyboard\**" />

Tests/UnitTestsParallelizable/Input/InputInjectorTests.cs

@@ -127,7 +127,7 @@ public void InjectKey_DefaultOptions_UsesDirectMode ()
     // BUGBUG: see https://github.com/gui-cs/Terminal.Gui/pull/4583#issuecomment-3769142085
 
     [Fact (Skip = "Using Task.Delay (50) will cause failures in slow CI/CD runners")]
-    public async Task InjectKey_Pipeline_AccentedKeys_RaisesAllEvents ()
+    public async Task InjectKey_Pipeline_AutoProcess_False_AccentedKeys_RaisesAllEvents ()
     {
         // Arrange
         VirtualTimeProvider timeProvider = new ();
@@ -185,7 +185,9 @@ public async Task InjectKey_Pipeline_AccentedKeys_RaisesAllEvents ()
         await Task.Delay (50, TestContext.Current.CancellationToken); // Allow some time for processing
         injector.ProcessQueue ();
 
-        // Assert - Should raise exactly 3 KeyDown events
+        Assert.Equal (AnsiPlatform.Degraded, ((AnsiOutput)app.Driver?.GetOutput ()!)._platform);
+
+        // Assert - Should raise exactly 34 KeyDown events
         Assert.Equal (34, receivedKeys.Count);
         Assert.Equal (new Key ('á'), receivedKeys [0]);
         Assert.Equal (new Key ('é'), receivedKeys [1]);
@@ -227,7 +229,7 @@ public async Task InjectKey_Pipeline_AccentedKeys_RaisesAllEvents ()
     // BUGBUG: when an accented char comes into the actual stdIn stream, only.
     // BUGBUG: see https://github.com/gui-cs/Terminal.Gui/pull/4583#issuecomment-3769142085
     [Fact (Skip = "Using Task.Delay (50) will cause failures in slow CI/CD runners")]
-    public async Task InjectKey_PipelineMode_MultipleKeys_RaisesAllEvents ()
+    public async Task InjectKey_PipelineMode_AutoProcess_True_MultipleKeys_RaisesAllEvents ()
     {
         // Arrange
         VirtualTimeProvider timeProvider = new ();
@@ -254,6 +256,8 @@ public async Task InjectKey_PipelineMode_MultipleKeys_RaisesAllEvents ()
         await Task.Delay (50, TestContext.Current.CancellationToken); // Allow some time for processing
         injector.ProcessQueue ();
 
+        Assert.Equal (AnsiPlatform.Degraded, ((AnsiOutput)app.Driver?.GetOutput ()!)._platform);
+
         // Assert - Should raise exactly 3 KeyDown events
         Assert.Equal (3, receivedKeys.Count);
         Assert.Equal (Key.A, receivedKeys [0]);

Tests/UnitTestsParallelizable/UnitTests.Parallelizable.csproj

@@ -25,6 +25,13 @@
     <SuppressNETCoreSdkPreviewMessage>true</SuppressNETCoreSdkPreviewMessage>
   </PropertyGroup>
 
+	<ItemGroup>
+		<RuntimeHostConfigurationOption
+			Include="Runtime.IsTestProject"
+			Value="true"
+			Trim="false" />
+	</ItemGroup>
+
   <PropertyGroup Condition="'$(Configuration)'=='Debug'">
     <DefineDebug>true</DefineDebug>
     <DefineConstants>$(DefineConstants);DEBUG_IDISPOSABLE</DefineConstants>