interpolation.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-masking/clip-path/interpolation.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<meta name="assert"

      content="This test checks if the inerpolation on clip-path is correct" />

<title>Tests for the output of the interpolation of clip-path</title>

<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-path">

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

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

<body>

<div id='log'></div>

<script type='text/javascript'>

'use strict';

function createDiv(test) {

  var element = document.createElement('div');

  document.body.appendChild(element);

  test.add_cleanup(function() {

    element.remove();

});

  return element;

test(function(t) {

  var div = createDiv(t);

  div.style.clipPath = 'circle(25px)';

  // The radius becomes negative between 60%~61%, so we set the delay to -61s.

  div.style.transition = 'all 100s cubic-bezier(0, 0, 1, -60) -61s';

  getComputedStyle(div).clipPath;

  div.style.clipPath = 'circle(26px)';

  assert_equals(getComputedStyle(div).clipPath, 'circle(0px)',

                'The radius of circle is clamped to zero at 61%');

}, 'Test circle with negative easing on clip-path');

test(function(t) {

  var div = createDiv(t);

  div.style.clipPath = 'ellipse(25px 25px)';

  // The radius becomes negative between 60%~61%, so we set the delay to -61s.

  div.style.transition = 'all 100s cubic-bezier(0, 0, 1, -60) -61s';

  getComputedStyle(div).clipPath;

  div.style.clipPath = 'ellipse(26px 26px)';

  assert_equals(getComputedStyle(div).clipPath, 'ellipse(0px 0px)',

                'The radius of ellipse is clamped to zero at 61%');

}, 'Test ellipse with negative easing on clip-path');

test(function(t) {

  var div = createDiv(t);

  div.style.clipPath = 'inset(10% round 25px)';

  // The radius becomes negative between 60%~61%, so we set the delay to -61s.

  div.style.transition = 'all 100s cubic-bezier(0, 0, 1, -60) -61s';

  getComputedStyle(div).clipPath;

  div.style.clipPath = 'inset(10% round 26px)';

  assert_equals(getComputedStyle(div).clipPath, 'inset(10%)',

                'The radius of inset is clamped to zero at 61%');

}, 'Test inset with negative easing on clip-path');

</script>

</html>