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Unquarantine RendererSynchronizationContextTest.Post_CanRunAsynchronously_WhenBusy_Exception #63400

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@oroztocil oroztocil commented Aug 23, 2025

This test has not failed in the last 30 days (https://dev.azure.com/dnceng-public/public/_test/analytics?definitionId=84&contextType=build).

When running all tests from the test class locally in a loop, 300/300 runs succeeded.

Fixes #61639

@github-actions github-actions bot added the area-blazor Includes: Blazor, Razor Components label Aug 23, 2025
@oroztocil oroztocil marked this pull request as ready for review August 25, 2025 10:18
@Copilot Copilot AI review requested due to automatic review settings August 25, 2025 10:18
@oroztocil oroztocil requested a review from a team as a code owner August 25, 2025 10:18
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Pull Request Overview

This PR unquarantines a test method that was previously isolated due to flakiness. The test Post_CanRunAsynchronously_WhenBusy_Exception has shown stability over the past 30 days with no failures recorded.

  • Removes the [QuarantinedTest] attribute from a previously flaky test
  • Restores the test to the normal test suite execution

@oroztocil
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Unfortunately, I could not find any change that we could point to as the reason that the test has been fixed (made deterministic). Neither the test class nor RendererSynchronizationContext which is being tested have changed since the test got quarantined.

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@oroztocil have you check the quarantined test history?

@javiercn javiercn enabled auto-merge (squash) August 25, 2025 11:41
@javiercn javiercn disabled auto-merge August 25, 2025 11:41
@javiercn javiercn enabled auto-merge (squash) August 25, 2025 11:41
@javiercn javiercn disabled auto-merge August 25, 2025 11:41
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Quarantine Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContextTest.Post_CanRunAsynchronously_WhenBusy_Exception
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