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<!doctype html>
<meta charset=utf-8>
<script src="../testcommon.js"></script>
<body>
<script>
'use strict';
function getMarginLeft(cs) {
return parseFloat(cs.marginLeft);
}
async_test(function(t) {
var div = addDiv(t);
var cs = window.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];
assert_equals(getMarginLeft(cs), 0,
'Initial value of margin-left is zero');
var previousAnimVal = getMarginLeft(cs);
animation.ready.then(waitForFrame).then(t.step_func(function() {
assert_true(getMarginLeft(cs) > previousAnimVal,
'margin-left is initially increasing');
animation.pause();
return animation.ready;
})).then(t.step_func(function() {
previousAnimVal = getMarginLeft(cs);
return waitForFrame();
})).then(t.step_func(function() {
assert_equals(getMarginLeft(cs), previousAnimVal,
'margin-left does not increase after calling pause()');
previousAnimVal = getMarginLeft(cs);
animation.play();
return animation.ready.then(waitForFrame);
})).then(t.step_func(function() {
assert_true(getMarginLeft(cs) > previousAnimVal,
'margin-left increases after calling play()');
t.done();
}));
}, 'pause() and play() a transition');
done();
</script>
</body>
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