File: fcp-video-frame.html

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<!DOCTYPE html>
<head>
<title>Performance Paint Timing Test: FCP due to loaded video frame</title>
</head>
<body>
<script src="../resources/utils.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/media.js"></script>
<video id="video" autoplay></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);
      // Set actual video content to trigger FCP.
      const video = document.getElementById('video');
      video.src = getVideoURI('/media/test');
      await new Promise(resolve => {
        video.oncanplay = resolve;
      });
      await assertFirstContentfulPaint(t);
  }, 'Video should become contentful when first frame is loaded');
</script>
</body>
</html>