testing/web-platform/tests/css/css-backgrounds/animations/border-top-width-composition.html
author Sotaro Ikeda <sotaro.ikeda.g@gmail.com>
Thu, 10 Jul 2025 00:10:09 +0000 (5 hours ago)
changeset 795941 23763b72c35abeead04f63e4503c28abc73d065d
parent 508727 b3a89d14f1b03b3311c11ad552ee8589dc47a6bd
permissions -rw-r--r--
Bug 1976135 - Remove nightly only limitation of pref gfx.webrender.layer-compositor r=gfx-reviewers,gw Differential Revision: https://phabricator.services.mozilla.com/D256379
<!DOCTYPE html>
<meta charset="UTF-8">
<title>border-top-width composition</title>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#border-width">
<meta name="assert" content="border-top-width supports animation by computed value">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>

<body>
<script>
test_composition({
  property: 'border-top-width',
  underlying: '50px',
  addFrom: '100px',
  addTo: '200px',
}, [
  {at: -0.3, expect: '120px'},
  {at: 0, expect: '150px'},
  {at: 0.5, expect: '200px'},
  {at: 1, expect: '250px'},
  {at: 1.5, expect: '300px'},
]);

test_composition({
  property: 'border-top-width',
  underlying: '100px',
  addFrom: '10px',
  addTo: '2px',
}, [
  {at: -0.5, expect: '114px'},
  {at: 0, expect: '110px'},
  {at: 0.5, expect: '106px'},
  {at: 1, expect: '102px'},
  {at: 1.5, expect: '98px'}, // Value clamping should happen after composition.
]);

test_composition({
  property: 'border-top-width',
  underlying: '10em',
  addFrom: '100px',
  addTo: '20em',
}, [
  {at: -0.3, expect: 'calc(130px + 4em)'},
  {at: 0, expect: 'calc(100px + 10em)'},
  {at: 0.5, expect: 'calc(50px + 20em)'},
  {at: 1, expect: '30em'},
  {at: 1.5, expect: 'calc(-50px + 40em)'},
]);

test_composition({
  property: 'border-top-width',
  underlying: '50px',
  addFrom: '100px',
  replaceTo: '200px',
}, [
  {at: -0.3, expect: '135px'},
  {at: 0, expect: '150px'},
  {at: 0.5, expect: '175px'},
  {at: 1, expect: '200px'},
  {at: 1.5, expect: '225px'},
]);
</script>
</body>