<!doctype html>
<meta charset=utf-8>
<title>CSSAnimation.finished</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) }
}
@keyframes def {}
</style>
<div id="log"></div>
<script>
'use strict';

const ANIM_PROP_VAL = 'abc 100s';
const ANIM_DURATION = 100 * MS_PER_SEC;

promise_test(async t => {
  const div = addDiv(t);

  // Set up pending animation
  div.style.animation = ANIM_PROP_VAL;
  const animation = div.getAnimations()[0];
  const originalFinishedPromise = animation.finished;

  // Cancel the animation and flush styles
  div.style.animation = '';
  getComputedStyle(div).animation;

  await promise_rejects_dom(t, 'AbortError', originalFinishedPromise,
                        'finished promise is rejected with AbortError');

  assert_not_equals(animation.finished, originalFinishedPromise,
                    'Finished promise should change after the original is ' +
                    'rejected');
}, 'finished 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 = ANIM_PROP_VAL;
  const animation = div.getAnimations()[0];
  const originalFinishedPromise = animation.finished;

  // Update the animation and flush styles
  div.style.animation = 'def 100s';
  getComputedStyle(div).animation;

  await promise_rejects_dom(t, 'AbortError', originalFinishedPromise,
                        'finished promise is rejected with AbortError');

  assert_not_equals(animation.finished, originalFinishedPromise,
                    'Finished promise should change after the original is ' +
                    'rejected');
}, 'finished promise is rejected when an animation is canceled by changing ' +
   'the animation property');

promise_test(async t => {
  const div = addDiv(t);
  div.style.animation = ANIM_PROP_VAL;
  const animation = div.getAnimations()[0];
  const originalFinishedPromise = animation.finished;
  animation.currentTime = ANIM_DURATION;

  await animation.finished;

  div.style.animationPlayState = 'running';
  await waitForAnimationFrames(2);

  assert_equals(animation.finished, originalFinishedPromise,
                'The finished promise should NOT be reset');
  assert_equals(animation.currentTime, ANIM_DURATION,
                'Sanity check: the current time should not change');
}, 'finished promise is not reset when animationPlayState is set to running');

</script>