CSSAnimation-ready.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-animations/CSSAnimation-ready.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>CSSAnimation.ready</title>

<!-- TODO: Add a more specific link for this once it is specified. -->

<link rel="help" href="https://drafts.csswg.org/css-animations-2/#cssanimation">

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

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

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

<style>

@keyframes abc {

  to { transform: translate(10px) }

</style>

<div id="log"></div>

<script>

'use strict';

promise_test(async t => {

  const div = addDiv(t);

  div.style.animation = 'abc 100s paused';

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

  const originalReadyPromise = animation.ready;

  await animation.ready;

  div.style.animationPlayState = 'running';

  assert_not_equals(animation.ready, originalReadyPromise,

                    'After updating animation-play-state a new ready promise'

                    + ' object is created');

}, 'A new ready promise is created when setting animation-play-state: running');

promise_test(async t => {

  const div = addDiv(t);

  // Set up pending animation

  div.style.animation = 'abc 100s';

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

  assert_true(animation.pending, 'Animation is initially pending');

  const readyPromise = animation.ready;

  // Cancel the animation and flush styles

  div.style.animation = '';

  getComputedStyle(div).animation;

  await promise_rejects_dom(t, 'AbortError', readyPromise,

                        'ready promise is rejected with AbortError');

}, 'ready promise is rejected when an animation is canceled by resetting'

   + ' the animation property');

promise_test(async t => {

  const div = addDiv(t);

  // As before, but this time instead of removing all animations, simply update

  // the list of animations. At least for Firefox, updating is a different

  // code path.

  // Set up pending animation

  div.style.animation = 'abc 100s';

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

  assert_true(animation.pending, 'Animation is initially pending');

  const readyPromise = animation.ready;

  // Update the animation and flush styles

  div.style.animation = 'def 100s';

  getComputedStyle(div).animation;

  await promise_rejects_dom(t, 'AbortError', readyPromise,

                        'ready promise is rejected with AbortError');

}, 'ready promise is rejected when an animation is canceled by updating'

   + ' the animation property');

promise_test(async t => {

  const div = addDiv(t, { style: 'animation: abc 100s' });

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

  const originalReadyPromise = animation.ready;

  await animation.ready;

  div.style.animationPlayState = 'paused';

  assert_not_equals(animation.ready, originalReadyPromise,

                    'A new Promise object is generated when setting'

                    + ' animation-play-state: paused');

}, 'A new ready promise is created when setting animation-play-state: paused');

promise_test(async t => {

  const div = addDiv(t, { style: 'animation: abc 100s' });

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

  await animation.ready;

  div.style.animationPlayState = 'paused';

  const firstReadyPromise = animation.ready;

  animation.pause();

  assert_equals(animation.ready, firstReadyPromise,

                'Ready promise objects are identical after redundant pause');

}, 'Pausing twice re-uses the same Promise');

</script>