worklet-animation-duration.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /animation-worklet/worklet-animation-duration.https.html - WPT Dashboard Interop Dashboard

<html>

<title>WorkletAnimation should continue to be in effect forever, even if its duration is passed</title>

<link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/web-animations/testcommon.js"></script>

<script src="common.js"></script>

<div id="box"></div>

<script>

  promise_test(async t => {

    await registerConstantLocalTimeAnimator(0.5);

    const box = document.getElementById('box');

    const effect = new KeyframeEffect(box,

        {transform: 'translateY(0px)' },

        {transform: 'translateY(200px)' }

      ], {

        duration: 1,

);

    const animation = new WorkletAnimation('constant_time', effect);

    animation.play();

    let expected_transform = "matrix(1, 0, 0, 1, 0, 100)";

    await waitForAnimationFrameWithCondition(_ => {

      return getComputedStyle(box).transform == expected_transform;

});

    // The animation is specified to last for 1 millisecond

    await new Promise(resolve => step_timeout(resolve, 500));

    assert_equals(getComputedStyle(document.getElementById("box")).transform, expected_transform);

  }, "WorkletAnimation should continue to be in effect forever, even if its duration is passed");

</script>