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Test Info: Warnings

<!DOCTYPE html>
<title>Cancel non accelerated property using worklet animation</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="common.js"></script>
#target {
background-color: red;
<div id="target"></div>
promise_test(async t => {
await registerConstantLocalTimeAnimator(1000);
const target = document.getElementById('target');
const effect = new KeyframeEffect(
{ background: 'green' },
{ background: 'blue' },
duration: 2000,
iteration: Infinity
const animation = new WorkletAnimation('constant_time', effect);;
await waitForAsyncAnimationFrames(1);
// establish that the animation started
assert_equals(getComputedStyle(target).backgroundColor, "rgb(0, 64, 128)");
await waitForAsyncAnimationFrames(1);
// confirm the animation is cancelled
assert_equals(getComputedStyle(target).backgroundColor, "rgb(255, 0, 0)");
}, "Animation should update the outputs after starting and then return to pre-animated values after being cancelled");