fcp-video-poster.html | Explore in Territory

<!DOCTYPE html>
<head>
<title>Performance Paint Timing Test: FCP due to loaded video poster</title>
</head>
<body>
<script src="../resources/utils.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<video id="video" width="50" height="50"></video>
<script>
  setup({"hide_test_state": true});
  promise_test(async t => {
    assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
    await new Promise(r => window.addEventListener('load', r));
    await assertNoFirstContentfulPaint(t);
    const video = document.getElementById('video');
    const src = '../resources/circles.png';
    const image = new Image();
    image.src = src;
    video.setAttribute('poster', src);
    await new Promise(resolve => {
        image.onload = async () => resolve();
    })
    await assertFirstContentfulPaint(t);
  }, 'Video should become contentful when poster is loaded');
</script>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/paint-timing/fcp-only/fcp-video-poster.html