[Webkit-unassigned] [Bug 284544] New: [scroll-animations] WPT test scroll-animations/scroll-timelines/reverse-animation.html has failures

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=284544

            Bug ID: 284544
           Summary: [scroll-animations] WPT test
                    scroll-animations/scroll-timelines/reverse-animation.h
                    tml has failures
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: graouts at webkit.org
                CC: graouts at apple.com, webkit-bug-importer at group.apple.com
            Blocks: 284541

The WPT test scroll-animations/scroll-timelines/reverse-animation.html has 3 failures:

FAIL Reversing an animation resets a sticky start time. assert_approx_equals: values do not match for "undefined" expected 100 +/- 0.125 but got 40
FAIL Reversing when when playbackRate == 0 should preserve the playback rate assert_approx_equals: values do not match for "Anchors to range start boundary when playback rate is zero" expected 0 +/- 0.125 but got 50
FAIL Reversing an idle animation aligns startTime with the rangeEnd boundary assert_approx_equals: values do not match for "animation.startTime should be at its effect end" expected 100 +/- 0.125 but got -100


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=284541
[Bug 284541] [scroll-animations] fix WPT failures under scroll-animations/scroll-timelines
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