test_animate_xrays.html

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<head>

<meta charset=utf-8>

<script type="application/javascript" src="../testharness.js"></script>

<script type="application/javascript" src="../testharnessreport.js"></script>

<script type="application/javascript" src="../testcommon.js"></script>

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<body>

<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1414674"

  target="_blank">Mozilla Bug 1414674</a>

<div id="log"></div>

<iframe id="iframe"

  src="http://example.org/tests/dom/animation/test/chrome/file_animate_xrays.html"></iframe>

<script>

'use strict';

var win = document.getElementById('iframe').contentWindow;

async_test(function(t) {

  window.addEventListener('load', t.step_func(function() {

    var target = win.document.getElementById('target');

    var anim = target.animate({opacity: [ 1, 0 ]}, 100 * MS_PER_SEC);

    // The frames object should be accessible via x-ray.

    var frames = anim.effect.getKeyframes();

    assert_equals(frames.length, 2,

                  "frames for Element.animate should be non-zero");

    assert_equals(frames[0].opacity, "1",

                  "first frame opacity for Element.animate should be specified value");

    assert_equals(frames[0].computedOffset, 0,

                  "first frame offset for Element.animate should be 0");

    assert_equals(frames[1].opacity, "0",

                  "last frame opacity for Element.animate should be specified value");

    assert_equals(frames[1].computedOffset, 1,

                  "last frame offset for Element.animate should be 1");

    t.done();

  }));

}, 'Calling animate() across x-rays');

</script>

</body>