Quarantine ServerVirtualizationTest.CancelsOutdatedRefreshes_Async

[github-actions]

Failing Test(s)

Microsoft.AspNetCore.Components.E2ETest.ServerExecutionTests.ServerVirtualizationTest.CancelsOutdatedRefreshes_Async

Error Message

Error details unavailable — this test runs in the components-e2e pipeline (pipeline 87) which executes E2E tests directly on CI agents without Helix infrastructure, so per-test error logs are not accessible via the public API.

Stacktrace

Details

Not available (see Error Message section above)

Logs

Details

Not available — E2E tests in pipeline 87 do not produce Helix console logs accessible via the public API.

Build

https://dev.azure.com/dnceng-public/public/_build/results?buildId=1363352

Generated by Daily Test Quarantine Management · ◷

Note

🔒 Integrity filter blocked 47 items

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

• #66092 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66084 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66075 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66070 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66061 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66060 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66003 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65930 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65928 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65893 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65891 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65887 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65880 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65871 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65870 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65869 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• ... and 31 more items

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 · ◷

[github-actions]

Investigation

This test is flaky specifically in the ServerVirtualizationTest (server-side rendering) context but not in the base Tests.VirtualizationTest (WASM/client-side) context.

Test Description

CancelsOutdatedRefreshes_Async scrolls an async virtualized list in increments and verifies that rapid successive scrolls cause earlier data fetches to be cancelled:

for (var y = 1000; y <= 5000; y += 1000)
{
    js.ExecuteScript($"document.getElementById('async-container').scrollTo(\{\{ top: {y} }})");
    Browser.Equal(y, () => (long)js.ExecuteScript("return document.getElementById('async-container').scrollTop"));
}
Browser.True(() => int.Parse(cancellationCount.Text, CultureInfo.InvariantCulture) > 0);

Likely Failure Modes

1. Scroll position assertion: Browser.Equal(y, ...) waits for the scroll position to equal y. In server-side mode, scroll events must be processed server-side, introducing latency. If the container hasn't scrolled to the exact position within the timeout, the assertion fails.

2. Cancellation race: The cancellation mechanism depends on new scroll events arriving before previous async data loads complete. In server-side mode, the timing is different — server-side rendering introduces additional latency between scroll event and cancellation being triggered.

3. State after initial load: The finishLoadingButton.Click() action loads initial items and waits for cancellationCount to be "0". In server-side mode, there may be additional rendering cycles that affect the state.

Recommendation

The root cause appears to be timing sensitivity amplified by server-side rendering round-trips. Consider whether the scroll velocity in server-side tests needs adjustment, or whether the cancellation verification needs a longer poll timeout to account for server-side overhead.

Note

🔒 Integrity filter blocked 47 items

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

• #66092 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66084 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66075 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66070 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66061 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66060 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #66003 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65930 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65928 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65893 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65891 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65887 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65880 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65871 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65870 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #65869 list_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• ... and 31 more items

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 · ◷