From 5ea54d8d017ee0644f03ab91ddab37e0d42f6109 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Amaury=20Lev=C3=A9?= <amauryleve@microsoft.com>
Date: Mon, 13 Jul 2026 21:57:25 +0200
Subject: [PATCH] Revert WinUI sample PackagedApp reference until packaged-app
 launch is supported

The Microsoft.Testing.Extensions.PackagedApp launcher only supports launching a loose-layout copy via Process.Start today; it cannot launch the packaged (MSIX) WinUI sample. Referencing the package auto-registered its ITestHostLauncher, forcing the platform's deploy-and-launch path (registering a launcher sets requireProcessRestart=true), so PR #9908 made the sample runtime-broken. Revert the reference until AUMID activation (#2784) lands, restoring the sample's working in-process state.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: c5c7d634-e822-4475-9312-a9dde92753f6
---
 samples/public/Directory.Build.props                       | 6 ------
 .../MSTestRunnerWinUI/MSTestRunnerWinUI.csproj             | 7 -------
 .../MSTestRunnerWinUI/UnitTestApp.xaml.cs                  | 5 -----
 3 files changed, 18 deletions(-)

diff --git a/samples/public/Directory.Build.props b/samples/public/Directory.Build.props
index eb17b3a68d..b32ba04ff3 100644
--- a/samples/public/Directory.Build.props
+++ b/samples/public/Directory.Build.props
@@ -19,12 +19,6 @@
     <MSTestEngineVersion>$(MSTestAOTVersion)</MSTestEngineVersion>
     <PlaywrightVersion>1.61.0</PlaywrightVersion>
     <TestingPlatformVersion>2.3.2</TestingPlatformVersion>
-    <!--
-      Microsoft.Testing.Extensions.PackagedApp is the experimental extension that deploys and launches
-      a packaged Windows (UWP/WinUI) test host. It versions independently from the 2.x testing platform
-      (it ships as a 1.0.0-alpha.* build), which is why it has its own property here.
-    -->
-    <MicrosoftTestingExtensionsPackagedAppVersion>1.0.0-alpha.26363.8</MicrosoftTestingExtensionsPackagedAppVersion>
     <VSTestVersion>18.7.0</VSTestVersion>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
     <NoWarn>$(NoWarn);SA0001;EnableGenerateDocumentationFile</NoWarn>
diff --git a/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/MSTestRunnerWinUI.csproj b/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/MSTestRunnerWinUI.csproj
index a578462ebb..b881234983 100644
--- a/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/MSTestRunnerWinUI.csproj
+++ b/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/MSTestRunnerWinUI.csproj
@@ -53,13 +53,6 @@
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.26100.7175" />
     <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.8.251106002" />
     <PackageReference Include="MSTest" Version="$(MSTestVersion)" />
-    <!--
-      Deploy and launch the packaged WinUI test host through Microsoft.Testing.Platform's ITestHostLauncher
-      extension point. Referencing the package is enough: its MSBuild props register the launcher through the
-      SelfRegisteredExtensions that this app already calls in UnitTestApp.OnLaunched (do NOT also call
-      AddPackagedAppDeployment() explicitly, as only one test host launcher may be registered). MTP-only.
-    -->
-    <PackageReference Include="Microsoft.Testing.Extensions.PackagedApp" Version="$(MicrosoftTestingExtensionsPackagedAppVersion)" Condition=" '$(EnableMSTestRunner)' == 'true' " />
   </ItemGroup>
 
   <!--
diff --git a/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/UnitTestApp.xaml.cs b/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/UnitTestApp.xaml.cs
index 7925dab0d3..db7d4990f0 100644
--- a/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/UnitTestApp.xaml.cs
+++ b/samples/public/mstest-runner/MSTestRunnerWinUI/MSTestRunnerWinUI/UnitTestApp.xaml.cs
@@ -61,11 +61,6 @@ void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
                 .Where(arg => !arg.Contains("EnableMSTestRunner"))
                 .ToArray();
             ITestApplicationBuilder builder = await TestApplication.CreateBuilderAsync(cliArgs);
-
-            // Registers all MSBuild-contributed extensions, including the Microsoft.Testing.Extensions.PackagedApp
-            // launcher (from the PackageReference in the csproj). That launcher deploys this packaged WinUI test
-            // host into an isolated directory and launches it from there through the platform's ITestHostLauncher
-            // extension point.
             builder.AddSelfRegisteredExtensions(cliArgs);
             using ITestApplication app = await builder.BuildAsync();
             await app.RunAsync();