zero-intrinsic-iteration-duration.tentative.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:
- /scroll-animations/view-timelines/zero-intrinsic-iteration-duration.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#named-timeline-range">

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

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

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

<script src="support/testcommon.js"></script>

<script src="/web-animations/resources/keyframe-utils.js"></script>

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

<title>Animation range updates play state</title>

</head>

<style type="text/css">

  @keyframes anim {

    from { background-color:  blue; }

    to { background-color:  white; }

  #scroller {

    border:  10px solid lightgray;

    overflow-y: scroll;

    overflow-x: hidden;

    width: 300px;

    height: 200px;

  #target {

    margin-top:  800px;

    margin-bottom: 800px;

    margin-left:  10px;

    margin-right:  10px;

    width: 100px;

    height: 100px;

    z-index: -1;

    background-color: green;

    animation:  anim auto linear;

    animation-timeline:  --t1;

    view-timeline:  --t1;

</style>

<body>

  <div id="scroller">

    <div id="target"></div>

  </div>

</body>

<script type="text/javascript">

  async function runTest() {

    promise_test(async t => {

      const anim = target.getAnimations()[0];

      await anim.ready;

      let duration = anim.effect.getComputedTiming().duration;

      assert_percents_equal(duration, CSS.percent(100),

                            'Default duration is 100%');

      // Start and end boundaries coincide.

      anim.rangeStart = "entry 100%";

      anim.rangeEnd = "contain 0%";

      duration = anim.effect.getComputedTiming().duration;

      assert_percents_equal(duration, CSS.percent(0),

                            "Duration is zero when boundaries coincide");

      // Start > end, clamp at zero duration.

      anim.rangeEnd = "entry 0%"

      duration = anim.effect.getComputedTiming().duration;

      assert_percents_equal(duration, CSS.percent(0),

                            "Duration is zero when start > end");

      anim.rangeStart = "normal";

      anim.rangeEnd = "normal";

      duration = anim.effect.getComputedTiming().duration;

      assert_percents_equal(duration, CSS.percent(100),

                            "Duration is 100% after range reset");

      // Consumed 100% of timeline duration with delays

      anim.effect.updateTiming({

        delay: CSS.percent(60),

        endDelay: CSS.percent(40)

});

      duration = anim.effect.getComputedTiming().duration;

      assert_percents_equal(duration, CSS.percent(0),

                            "Duration is 0% after delays sum to 100%");

      // Delays sum to > 100%

      anim.effect.updateTiming({

        delay: CSS.percent(60),

        endDelay: CSS.percent(60)

});

      duration = anim.effect.getComputedTiming().duration;

      assert_percents_equal(duration, CSS.percent(0),

                            "Duration is 0% after delays sum to > 100%");

      anim.effect.updateTiming({

        delay: CSS.percent(40),

        endDelay: CSS.percent(40)

});

      duration = anim.effect.getComputedTiming().duration;

      assert_percents_equal(

          duration, CSS.percent(20),

          "Duration is 20% if normal range and delays sum to 80%");

    }, 'Intrinsic iteration duration is non-negative');

  window.onload = runTest;

</script>