KeyframeEffect-getKeyframes-correct-context.html

<!DOCTYPE html>
<meta charset=utf-8>
<title>KeyframeEffect::getKeyframes should use correct context</title>

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../external/wpt/web-animations/testcommon.js"></script>

<div id="elem"></div>
<iframe id="iframe"></iframe>

<script>
"use strict";

// This test checks a particularly nasty corner-case of getKeyframes(). Because
// getKeyframes() manually constructs a JavaScript object to pass back, care
// must be taken to ensure that the resultant object is in the same context as
// the KeyframeEffect object it is being applied to.
test(function(t) {
  const effect = new KeyframeEffect(elem, [
      { left: "0px" },
      { left: "20px" }
  ], 1000);
  const iframe = document.getElementById("iframe");
  const keyframes = iframe.contentWindow.KeyframeEffect.prototype
      .getKeyframes.apply(effect);

  assert_equals(Object.getPrototypeOf(keyframes[0]), Object.prototype);
}, "Applying getKeyframes to a KeyframeEffect object from another "
   + " frame should produce keyframes in the same frame as the object.");

</script>

chromium/third_party/blink/web_tests/animations/web-animations/KeyframeEffect-getKeyframes-correct-context.html