background-color-animation-with-transform.html

<!DOCTYPE html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<style>
#target {
  width: 100px;
  height: 100px;
  background-color: red;
  transform: translate(10px, 10px);
}
</style>
<div id="target"></div>
<script>
promise_test(function() {
  var animation = target.animate(
  [
    { backgroundColor: 'blue' },
    { backgroundColor: 'green'},
  ], {
    duration: 3000,
    iterations: Infinity
  });
  return animation.ready.then(() => {
    assert_true(internals.isCompositedAnimation(animation));
  });
}, 'background color animations should run on the compositor in the presence of transforms');
</script>

chromium/third_party/blink/web_tests/virtual/threaded/background-color-animation-with-transform.html