<!DOCTYPE html>
<meta charset=utf-8>
<title>Animation constructor</title>
<link rel="help" href="https://drafts.csswg.org/web-animations/#dom-animation-animation">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../testcommon.js"></script>
<body>
<div id="log"></div>
<div id="target"></div>
<script>
'use strict';

const gTarget = document.getElementById('target');

function createEffect() {
  return new KeyframeEffect(gTarget, { opacity: [0, 1] });
}

function createNull() {
  return null;
}

const gTestArguments = [
  {
    createEffect: createNull,
    timeline: null,
    expectedTimeline: null,
    expectedTimelineDescription: 'null',
    description: 'with null effect and null timeline'
  },
  {
    createEffect: createNull,
    timeline: document.timeline,
    expectedTimeline: document.timeline,
    expectedTimelineDescription: 'document.timeline',
    description: 'with null effect and non-null timeline'
  },
  {
    createEffect: createNull,
    expectedTimeline: document.timeline,
    expectedTimelineDescription: 'document.timeline',
    description: 'with null effect and no timeline parameter'
  },
  {
    createEffect: createEffect,
    timeline: null,
    expectedTimeline: null,
    expectedTimelineDescription: 'null',
    description: 'with non-null effect and null timeline'
  },
  {
    createEffect: createEffect,
    timeline: document.timeline,
    expectedTimeline: document.timeline,
    expectedTimelineDescription: 'document.timeline',
    description: 'with non-null effect and non-null timeline'
  },
  {
    createEffect: createEffect,
    expectedTimeline: document.timeline,
    expectedTimelineDescription: 'document.timeline',
    description: 'with non-null effect and no timeline parameter'
  },
];

for (const args of gTestArguments) {
  test(t => {
    const effect = args.createEffect();
    const animation = new Animation(effect, args.timeline);

    assert_not_equals(animation, null,
                      'An animation sohuld be created');
    assert_equals(animation.effect, effect,
                  'Animation returns the same effect passed to ' +
                  'the Constructor');
    assert_equals(animation.timeline, args.expectedTimeline,
                  'Animation timeline should be ' + args.expectedTimelineDescription);
    assert_equals(animation.playState, 'idle',
                  'Animation.playState should be initially \'idle\'');
  }, 'Animation can be constructed ' + args.description);
}

test(t => {
  const effect = new KeyframeEffect(null,
                                    { left: ['10px', '20px'] },
                                    { duration: 10000, fill: 'forwards' });
  const anim = new Animation(effect, document.timeline);
  anim.pause();
  assert_equals(effect.getComputedTiming().progress, 0.0);
  anim.currentTime += 5000;
  assert_equals(effect.getComputedTiming().progress, 0.5);
  anim.finish();
  assert_equals(effect.getComputedTiming().progress, 1.0);
}, 'Animation constructed by an effect with null target runs normally');

async_test(t => {
  const iframe = document.createElement('iframe');

  iframe.addEventListener('load', t.step_func(() => {
    const div = createDiv(t, iframe.contentDocument);
    const effect = new KeyframeEffect(div, null, 10000);
    const anim = new Animation(effect);
    assert_equals(anim.timeline, document.timeline);
    iframe.remove();
    t.done();
  }));

  document.body.appendChild(iframe);
}, 'Animation constructed with a keyframe that target element is in iframe');

</script>
</body>