Quarantine ServerVirtualizationTest.DynamicContent_PrependItemsWhileScrolledToMiddle_VisibleItemsStayInPlace

[github-actions]

Failing Test(s)

Microsoft.AspNetCore.Components.E2ETest.ServerExecutionTests.ServerVirtualizationTest.DynamicContent_PrependItemsWhileScrolledToMiddle_VisibleItemsStayInPlace

Error Message

E2E browser test failure - error details available in the build logs.
The test failed 3 times across builds in the components-e2e pipeline (87).

Stacktrace

Details

Error details available in the Helix/build logs linked below.

Logs

Details

Error details available in the components-e2e pipeline build logs.

Build

https://dev.azure.com/dnceng-public/public/_build/results?buildId=1365779

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

ServerVirtualizationTest.DynamicContent_PrependItemsWhileScrolledToMiddle_VisibleItemsStayInPlace has failed 3 times in the last 30 days (builds 1365779, 1363611, 1361845) in the components-e2e pipeline (pipeline 87). Per-test error details are not accessible via the public API for this pipeline.

Test context: This is a server-execution variant of the E2E virtualization test (VirtualizationTest base class). The test verifies that when items are prepended to a virtualized list while the user is scrolled to the middle, the visible items remain in place (don't visually jump).

Why server-only fails: The ServerVirtualizationTest runs the same test logic but with server-side rendering (Blazor Server / SignalR), which introduces network latency between browser events and the component re-render. The base VirtualizationTest (which uses Blazor WebAssembly or WASM) doesn't fail because DOM updates happen synchronously in-process.

Likely root cause: A timing race between:

1. The scroll position snapshot taken before prepending items
2. The re-render triggered by the server
3. The browser's DOM update which may arrive out-of-order with the scroll adjustment

Recommendation: Add explicit wait conditions in the test for the virtualization component to complete its layout recalculation after items are prepended, before asserting scroll positions.

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 · ◷