Element-getAnimations.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-transitions/Element-getAnimations.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Element.getAnimations() for CSS transitions</title>

<link rel="help" href="https://drafts.csswg.org/css-transitions-2/#animation-composite-order">

<!-- 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';

promise_test(async t => {

  const div = addDiv(t);

  div.style.left = '0px';

  div.style.top = '0px';

  getComputedStyle(div).transitionProperty;

  div.style.transition = 'all 100s';

  div.style.left = '100px';

  div.style.top = '100px';

  assert_equals(div.getAnimations().length, 2);

}, 'getAnimations returns one Animation per transitioning property');

test(t => {

  const div = addDiv(t, { style: 'left: 0px; transition: all 100s' });

  getComputedStyle(div).left;

  div.style.left = '100px';

  assert_class_string(div.getAnimations()[0], 'CSSTransition',

                      'Interface of returned animation is CSSTransition');

}, 'getAnimations returns CSSTransition objects for CSS Transitions');

promise_test(async t => {

  const div = addDiv(t);

  div.style.left = '0px';

  getComputedStyle(div).left;

  div.style.transition = 'all 0.01s';

  div.style.left = '100px';

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

  await animation.finished;

  assert_equals(div.getAnimations().length, 0);

}, 'getAnimations does not return finished CSS Transitions');

test(t => {

  const div = addDiv(t);

  // animation-duration is not animatable

  div.style.animationDuration = '10s';

  getComputedStyle(div).animationDuration;

  div.style.transition = 'all 100s';

  div.style.animationDuration = '100s';

  assert_equals(div.getAnimations().length, 0);

}, 'getAnimations does not return a transition for a non-animatable property');

test(t => {

  const div = addDiv(t);

  div.style.setProperty('-vendor-unsupported', '0px', '');

  getComputedStyle(div).transitionProperty;

  div.style.transition = 'all 100s';

  div.style.setProperty('-vendor-unsupported', '100px', '');

  assert_equals(div.getAnimations().length, 0);

}, 'getAnimations does not return a transition for an unsupposed property');

test(t => {

  const div = addDiv(t, { style: 'transform: translate(0px); ' +

                                 'opacity: 0; ' +

                                 'border-width: 0px; ' + // Shorthand

                                 'border-style: solid' });

  getComputedStyle(div).transform;

  div.style.transition = 'all 100s';

  div.style.transform = 'translate(100px)';

  div.style.opacity = '1';

  div.style.borderWidth = '1px';

  const animations = div.getAnimations();

  assert_equals(animations.length, 6,

                'Generated expected number of transitions');

  assert_equals(animations[0].transitionProperty, 'border-bottom-width');

  assert_equals(animations[1].transitionProperty, 'border-left-width');

  assert_equals(animations[2].transitionProperty, 'border-right-width');

  assert_equals(animations[3].transitionProperty, 'border-top-width');

  assert_equals(animations[4].transitionProperty, 'opacity');

  assert_equals(animations[5].transitionProperty, 'transform');

}, 'getAnimations sorts simultaneous transitions by name');

test(t => {

  const div = addDiv(t, { style: 'transform: translate(0px); ' +

                                 'opacity: 0' });

  getComputedStyle(div).transform;

  div.style.transition = 'all 100s';

  div.style.transform = 'translate(100px)';

  assert_equals(div.getAnimations().length, 1,

                'Initially there is only one (transform) transition');

  div.style.opacity = '1';

  assert_equals(div.getAnimations().length, 2,

                'Then a second (opacity) transition is added');

  const animations = div.getAnimations();

  assert_equals(animations[0].transitionProperty, 'transform');

  assert_equals(animations[1].transitionProperty, 'opacity');

}, 'getAnimations sorts transitions by when they were generated');

</script>