[Webkit-unassigned] [Bug 165756] New: media.webkitPresentationMode may return "inline" in a webkitpresentationmodechanged event handler after entering PiP

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=165756

            Bug ID: 165756
           Summary: media.webkitPresentationMode may return "inline" in a
                    webkitpresentationmodechanged event handler after
                    entering PiP
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: graouts at apple.com

The test at media/modern-media-controls/pip-support/pip-support-click.html is flaky due to "media.webkitPresentationMode" sometimes returning "inline" within a "webkitpresentationmodechanged" event handler after entering PiP. To reproduce, try to run this command:

Tools/Scripts/run-webkit-tests --release --time-out-ms=5000 --no-sample-on-timeout --exit-after-n-failures=1 --iterations=200 media/modern-media-controls/pip-support/pip-support-click.html

Adding a short timeout works around the problem:

media.addEventListener("webkitpresentationmodechanged", () => {
    setTimeout(() => {
        shouldBeEqualToString("media.webkitPresentationMode", "picture-in-picture");
        container.remove();
        media.remove();
        finishJSTest();
    }, 10);
});

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