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https://github.com/web-platform-tests/wpt
26 December 2018, 22:31:15 UTC
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Tip revision: eb313d646aff9c95247c506a19f1922f44b267ea authored by Sandra Sun on 19 December 2018, 15:38:18 UTC
Snap after layout change
Tip revision: eb313d6
CSSTransition-effect.tentative.html 
<!doctype html>
<meta charset=utf-8>
<title>CSSTransition.effect</title>
<!-- TODO: Add a more specific link for this once it is specified. -->
<link rel="help" href="https://drafts.csswg.org/css-transitions-2/#csstransition">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src='support/helper.js'></script>
<div id="log"></div>
<script>
'use strict';

test(t => {
  const div = addDiv(t);
  div.style.left = '0px';

  div.style.transition = 'left 100s';
  getComputedStyle(div).left;
  div.style.left = '100px';

  const transition = div.getAnimations()[0];

  transition.effect = null;

  assert_equals(transition.transitionProperty, 'left');
}, 'After setting a transition\'s effect to null, it still reports the'
   + ' original transition property');

promise_test(async t => {
  const div = addDiv(t);
  div.style.left = '0px';

  div.style.transition = 'left 100s';
  getComputedStyle(div).left;
  div.style.left = '100px';

  const transition = div.getAnimations()[0];
  await transition.ready;

  transition.effect = null;
  assert_equals(transition.playState, 'finished');
}, 'After setting a transition\'s effect to null, it becomes finished');

promise_test(async t => {
  const div = addDiv(t);
  div.style.left = '0px';

  div.style.transition = 'left 100s';
  getComputedStyle(div).left;
  div.style.left = '100px';

  const transition = div.getAnimations()[0];
  await transition.ready;

  transition.effect = null;
  assert_equals(getComputedStyle(div).left, '100px');
}, 'After setting a transition\'s effect to null, style is updated');

promise_test(async t => {
  const div = addDiv(t);
  div.style.left = '0px';
  div.style.width = '0px';

  div.style.transition = 'left 100s';
  getComputedStyle(div).left;
  div.style.left = '100px';

  const transition = div.getAnimations()[0];
  await transition.ready;

  transition.currentTime = 50 * MS_PER_SEC;
  transition.effect = new KeyframeEffect(div,
                                         { left: [ '0px' , '100px'] },
                                         20 * MS_PER_SEC);

  assert_equals(transition.playState, 'finished');
}, 'After setting a new keyframe effect with a shorter duration,'
   + ' the transition becomes finished');

promise_test(async t => {
  const div = addDiv(t);
  div.style.left = '0px';
  div.style.width = '0px';

  div.style.transition = 'left 100s';
  getComputedStyle(div).left;
  div.style.left = '100px';

  const transition = div.getAnimations()[0];
  transition.effect = new KeyframeEffect(div,
                                         { marginLeft: [ '0px' , '100px'] },
                                         100 * MS_PER_SEC);
  assert_equals(transition.transitionProperty, 'left');
}, 'After setting a new keyframe effect targeting different properties,'
   + ' the transition continues to report the original transition property');

promise_test(async t => {
  const div = addDiv(t);
  div.style.left = '0px';
  div.style.width = '0px';

  div.style.transition = 'left 100s';
  getComputedStyle(div).left;
  div.style.left = '100px';

  const transition = div.getAnimations()[0];
  assert_true(transition.pending);

  transition.effect = new KeyframeEffect(div,
                                         { marginLeft: [ '0px' , '100px'] },
                                         100 * MS_PER_SEC);
  assert_equals(transition.transitionProperty, 'left');
  assert_true(transition.pending);

  // As a sanity check, check that the transition actually exits the
  // pending state.
  await transition.ready;
  assert_false(transition.pending);
}, 'After setting a new keyframe effect on a play-pending transition,'
   + ' the transition remains pending');

</script>
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