Quarantine Re-quarantine WebWorkerTemplateE2ETest tests (CanInvokeMethods, HandlesErrors, CanDisposeWorker)

[github-actions]

Tests were unquarantined in #66072 on 2026-04-02 but are already failing again, indicating they were unquarantined too early.

Failing Test(s)

• BlazorTemplates.Tests.WebWorkerTemplateE2ETest.WebWorkerTemplate_CanInvokeMethods
• BlazorTemplates.Tests.WebWorkerTemplateE2ETest.WebWorkerTemplate_HandlesErrors
• BlazorTemplates.Tests.WebWorkerTemplateE2ETest.WebWorkerTemplate_CanDisposeWorker

Error Message

Tests failed (see build log for details)

These tests run as template E2E tests (not through Helix), so detailed error messages are available in the build log.

Stacktrace

Details

Error details available in the build log linked below.

Logs

Details

[Run build.cmd] XUnit(0,0): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Tests failed: D:\a\_work\1\s\artifacts\TestResults\Release\Templates.Blazor.Tests_net11.0_x64.html [net11.0|x64]

Build

https://dev.azure.com/dnceng-public/public/_build/results?buildId=1342501

Originally quarantined under #66035.

Note

🔒 Integrity filter blocked 12 items

The following items were blocked because they don't meet the GitHub integrity level.

• #65815 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65817 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65827 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65816 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66130 issue_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66135 issue_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #40626 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #46028 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #49286 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #54846 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #55092 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #55707 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by Daily Test Quarantine Management · ● 25.1M · ◷

[github-actions]

Investigation

These tests were unquarantined on 2026-04-02 via PR #66072 after passing 100% for 30+ days in the quarantined pipeline. However, they failed again within 2 days in build 1342501.

The WebWorker template E2E tests use Selenium (Chromium) to test a Blazor WebWorker application that uses SharedWorker/Worker browser APIs. The tests involve:

• CanInvokeMethods: Tests calling methods on a WebWorker
• HandlesErrors: Tests error handling in WebWorker
• CanDisposeWorker: Tests proper worker disposal

The pattern of repeated flakiness (quarantined → unquarantined → immediately failing again) suggests this is a systemic issue with the Blazor WebWorker template tests in CI, likely related to:

1. Browser/Selenium timing in headless Chromium
2. SharedWorker initialization timing
3. CI environment resource constraints

The root cause is unclear from available logs. Recommend investigating the browser automation setup and whether flake rates have changed with recent Selenium or Chromium version updates.

Note

🔒 Integrity filter blocked 12 items

The following items were blocked because they don't meet the GitHub integrity level.

• #65815 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65817 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65827 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65816 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66130 issue_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66135 issue_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #40626 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #46028 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #49286 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #54846 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #55092 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #55707 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by Daily Test Quarantine Management · ● 25.1M · ◷