commit | 11652c978b897c7b9398942c450f517621634d97 | [log] [tgz] |
---|---|---|
author | Ming-Ying Chung <mych@chromium.org> | Wed Jan 17 12:35:11 2024 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Wed Jan 17 12:53:41 2024 |
tree | dde70c543ec503ee771ac3dc2bd89cd6e38bd066 | |
parent | e3365d8440796f310ed38d4de3d4789fb611bb96 [diff] |
Deflake WPT `report-same-origin-with-cookies.html` ## Context A flakiness of this test was reported [1] when the KeepAliveInBrowserMigration was enabled in fieldtrial testing config. It appears that the same-origin CSP request (which is also a fetch keepalive request) made by the browser contains no expected cookie. However, this behavior is not specific to the enabled migration. It can be unreliably repro-d by slowing down the browser handling of the CSP report-uri request (e.g. happens after I added many STDERR logging statements to the KeepAliveURLLoader related codes). ## Root Cause The JS statement to clear the cookie, i.e. ``` test.add_cleanup(() => { // May be executed before report-uri request, which can outlive the // document! document.cookie = "cspViolationReportCookie2=; path=/; expires=Thu, 01 Jan 1970 00:00:01 GMT"; }); ``` that intended to be executed after test finished, sometimes get executed "before" the browser sending out the CSP report-uri request, leading to a no-cookie report request. ## The Fix This CL removes the clearing of cookie `cspViolationReportCookie2` to prevent from any potential flakiness. Note that it should not affect any other tests (nor this test), as this cookie is only used by this WPT. Also, this WPT actually sets two cookies, `cspViolationReportCookie2` (via python server) and `report-same-origin-with-cookies` (via .headers file). But the latter one is never cleared. ## Tested This CL is tested via the same way mentioned in [2]. [1]: https://crbug.com/1509997#c5 [2]: https://crbug.com/1509997#c12 Bug: 1356128,1509997 Change-Id: If3559728670f88cb7fce2504a9ed13fbe76937a3 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5203976 Reviewed-by: Antonio Sartori <antoniosartori@chromium.org> Commit-Queue: Ming-Ying Chung <mych@chromium.org> Cr-Commit-Position: refs/heads/main@{#1248079}
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