[Webkit-unassigned] [Bug 214412] New: REGRESSION [ macOS ] fullscreen/video-controls-rtl.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214412

            Bug ID: 214412
           Summary: REGRESSION [ macOS ]
                    fullscreen/video-controls-rtl.html is a flaky failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hector_i_lopez at apple.com

fullscreen/video-controls-rtl.html

Test appears to begin flaky failing around r263839

History:
https://results.webkit.org/?suite=layout-tests&test=fullscreen%2Fvideo-controls-rtl.html

Diff:
--- /Volumes/Data/slave/catalina-debug-tests-wk1/build/layout-test-results/fullscreen/video-controls-rtl-expected.txt
+++ /Volumes/Data/slave/catalina-debug-tests-wk1/build/layout-test-results/fullscreen/video-controls-rtl-actual.txt
@@ -4,8 +4,8 @@
 EVENT(webkitfullscreenchange)
 EXPECTED (shadowRoot = internals.shadowRoot(video) != 'null') OK
 EXPECTED (volumeBox = mediaControlsElement(shadowRoot.firstChild, '-webkit-media-controls-volume-slider-container') != 'null') OK
-EXPECTED (volumeBox.classList.contains('uses-ltr-user-interface-layout-direction') == 'true') OK
-EXPECTED (document.defaultView.getComputedStyle(volumeBox)['transform'] == 'none') OK
+EXPECTED (volumeBox.classList.contains('uses-ltr-user-interface-layout-direction') == 'true'), OBSERVED 'false' FAIL
+EXPECTED (document.defaultView.getComputedStyle(volumeBox)['transform'] == 'none'), OBSERVED 'matrix(-1, 0, 0, 1, 23, 0)' FAIL
 EXPECTED (volumeBox.classList.contains('uses-ltr-user-interface-layout-direction') == 'false') OK
 EXPECTED (document.defaultView.getComputedStyle(volumeBox)['transform'] == 'matrix(-1, 0, 0, 1, 23, 0)') OK
 EXPECTED (volumeBox.classList.contains('uses-ltr-user-interface-layout-direction') == 'true') OK

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