Fix flaky test failures on x86 leg

[singhashish-wpf]

Fix flaky test failures on x86 leg
disable tests in official pipeline
tests in official pipelines disturb insertion in windowsdesktop and sdk.

Microsoft Reviewers: Open in CodeFlow

[Copilot]

Pull Request Overview

This PR aims to address flaky test failures on the x86 leg by modifying the pipeline conditions for running xUnit tests.

• Updated the platform condition to restrict test execution only to x64 builds.

Comments suppressed due to low confidence (1)

eng/pipeline.yml:170

• The updated condition restricts test execution to only when _Platform is 'x64'. If the intention was to fix flaky failures on the x86 leg, confirm that this condition correctly targets the desired platform or revise it to include the proper platform specification.

condition: and(or(ne(variables['_HelixPipeline'], 'true'), and(eq(variables['_HelixPipeline'], 'true') ,eq(variables['_BuildConfig'], 'Release'), eq(variables['_PublicBuildPipeline'], 'true'), eq(variables['_ContinuousIntegrationTestsEnabled'], 'true'))), eq(variables['_Platform'], 'x64'))

[singhashish-wpf]

@ViktorHofer Regarding the build failures mentioned due to flaky xunit tests, proposing this change to run the xunit tests only on x64. This appears due to the x64 forcing.
I observed that the test failures are in x86 leg only on the official pipeline. Let me know if I am missing something here.

[ViktorHofer]

You have platform specific assemblies in wpf, right? I assume that with this change, the x86 and arm64 artifacts won't get tested anymore?

[singhashish-wpf]

You have platform specific assemblies in wpf, right? I assume that with this change, the x86 and arm64 artifacts won't get tested anymore?

AFAIK, the current unit tests aren't testing those platforms specific assemblies.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 11.39785%. Comparing base (8f9956b) to head (c92bcf2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #10591         +/-   ##
===================================================
- Coverage   11.55761%   11.39785%   -0.15977%     
===================================================
  Files           3214        3214                 
  Lines         648508      648508                 
  Branches       71511       71511                 
===================================================
- Hits           74952       73916       -1036     
- Misses        572395      573435       +1040     
+ Partials        1161        1157          -4     

Flag	Coverage Δ
Debug	11.39785% <ø> (-0.05612%)	⬇️

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[ViktorHofer]

Please backport this into the 10.0 Preview 3 branch and also consider enabling pipeline notifications for future official build failures.

[singhashish-wpf]

/backport to release/10.0-preview3

[github-actions]

Started backporting to release/10.0-preview3: https://github.com/dotnet/wpf/actions/runs/13926870389