Bug 221351 – [ MacOS WK2 ] media/modern-media-controls/media-controller/media-controller-fullscreen-change.html is a flakey text failure

• Component: New Bugs
• Status: NEW

[Robert Jenner]

media/modern-media-controls/media-controller/media-controller-fullscreen-change.html 

Is a flakey text failure in MacOS WK2. 

HISTORY URL:
https://results.webkit.org/?suite=layout-tests&test=media%2Fmodern-media-controls%2Fmedia-controller%2Fmedia-controller-fullscreen-change.html


DIFF URL:
https://build.webkit.org/results/Apple-BigSur-Release-WK2-Tests/r272328%20(1395)/media/modern-media-controls/media-controller/media-controller-fullscreen-change-pretty-diff.html

DIFF TEXT:
--- /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/media/modern-media-controls/media-controller/media-controller-fullscreen-change-expected.txt
+++ /Volumes/Data/slave/bigsur-release-tests-wk2/build/layout-test-results/media/modern-media-controls/media-controller/media-controller-fullscreen-change-actual.txt
@@ -3,17 +3,9 @@
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS internals.isChangingPresentationMode(media) became false
-Media entered fullscreen
-PASS mediaController.layoutTraits is LayoutTraits.macOS | LayoutTraits.Fullscreen
-PASS mediaController.controls instanceof MacOSFullscreenMediaControls is true
-
-PASS internals.isChangingPresentationMode(media) became false
-Media exited fullscreen
-PASS mediaController.layoutTraits is LayoutTraits.macOS | LayoutTraits.Inline
-PASS mediaController.controls instanceof MacOSInlineMediaControls is true
-
+Toggling fullscreen failed
 PASS successfullyParsed is true
 
 TEST COMPLETE
 
+Enter Fullscreen

[Radar WebKit Bug Importer]

<rdar://problem/73943835>

[Robert Jenner]

Unable to reproduce locally at this time. 

History indicates flakey test occurs on Big Sur, Catalina, and Mojave on WK2 only.

[Ryan Haddad]

It looks like this test had been marked as a failure up until https://trac.webkit.org/changeset/271377/webkit, so I'm not sure whether or not this flakiness is "new" (though, the diff was not the same on the one result I spot-checked).

Adding Peng in case this is relevant.