<!doctype html>
<meta charset=utf-8>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../resources/testcommon.js"></script>
<body>
<div id="log"></div>
<script>
'use strict';

async_test(function(t) {
  var div = addDiv(t);
  var cs = getComputedStyle(div);

  div.style.marginLeft = '0px';
  cs.marginLeft; // Flush style to set up transition start point
  div.style.transition = 'margin-left 100s';
  div.style.marginLeft = '10000px';
  cs.marginLeft;

  var animation = div.getAnimations()[0];
  var previousProgress = animation.effect.getComputedTiming().progress;
  assert_equals(previousProgress, 0, 'Initial value of progress is zero');

  animation.ready.then(waitForNextFrame).then(t.step_func(function() {
    assert_greater_than(animation.effect.getComputedTiming().progress,
                        previousProgress,
                        'Iteration progress is initially increasing');
    animation.pause();
    return animation.ready;
  })).then(t.step_func(function() {
    previousProgress = animation.effect.getComputedTiming().progress;
    return waitForNextFrame();
  })).then(t.step_func(function() {
    assert_equals(animation.effect.getComputedTiming().progress,
                  previousProgress,
                  'Iteration progress does not increase after calling pause()');
    previousProgress = animation.effect.getComputedTiming().progress;
    animation.play();
    return animation.ready.then(waitForNextFrame);
  })).then(t.step_func(function() {
    assert_greater_than(animation.effect.getComputedTiming().progress,
                        previousProgress,
                        'Iteration progress increases after calling play()');
    t.done();
  }));
}, 'pause() and play() a transition');

</script>
</body>