[Webkit-unassigned] [Bug 273251] New: [ EWS MacOS WK1 ] http/tests/media/hls/hls-webvtt-style.html is a flaky timeout

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=273251

            Bug ID: 273251
           Summary: [ EWS MacOS WK1 ]
                    http/tests/media/hls/hls-webvtt-style.html is a flaky
                    timeout
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Morningstar at apple.com

http/tests/media/hls/hls-webvtt-style.html is a flaky timeout and it's causing false positives on EWS

When looking at the history, it was a lot more common of a timeout on Ventura WK1 until recently, but it's still causing problems on EWS so we will need expectations for this.

History:
https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fmedia%2Fhls%2Fhls-webvtt-style.html&flavor=wk1
EWS:
https://ews-build.webkit.org/#/builders/53

Test-run:
https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Ventura-Release-WK1-Tests-EWS/af20e43c-532/results.html

DIFF:
--- /Volumes/Data/worker/macOS-AppleSilicon-Ventura-Release-WK1-Tests-EWS/build/layout-test-results/http/tests/media/hls/hls-webvtt-style-expected.txt
+++ /Volumes/Data/worker/macOS-AppleSilicon-Ventura-Release-WK1-Tests-EWS/build/layout-test-results/http/tests/media/hls/hls-webvtt-style-actual.txt
@@ -1,13 +1,6 @@
+FAIL: Timed out waiting for notifyDone to be called

 EVENT(addtrack)
 EXPECTED (video.textTracks.length == '1') OK
 RUN(video.textTracks[0].mode = 'showing')
-EVENT(cuechange)
-RUN(textTrackContainer = window.internals.shadowRoot(video).querySelector("div[useragentpart=-webkit-media-text-track-container]"))
-RUN(cue = textTrackContainer.querySelector("span[useragentpart=cue]"))
-EXPECTED (getComputedStyle(cue).backgroundColor == 'rgba(255, 0, 0, 0.5)') OK
-EXPECTED (getComputedStyle(cue.children[0]).backgroundColor == 'rgba(0, 0, 0, 0)') OK
-EXPECTED (getComputedStyle(cue.children[1]).backgroundColor == 'rgb(0, 255, 0)') OK
-EXPECTED (getComputedStyle(cue.children[2]).fontSize == '48px') OK
-END OF TEST

DIFF-URL:
https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Ventura-Release-WK1-Tests-EWS/af20e43c-532/http/tests/media/hls/hls-webvtt-style-diff.txt

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