sandboxed-video.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/read-media/sandboxed-video.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Test load of media document in sandboxed iframe</title>

<link rel="motivation" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1783601">

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<body></body>

<script>

promise_test(async () => {

  const frame = document.createElement('iframe');

  frame.sandbox = '';

  frame.src =

    // 'PartialContent' ensures that the entire video resource does not load

    // in one fetch.

    '/service-workers/service-worker/resources/fetch-access-control.py?'

    + 'VIDEO&PartialContent';

  document.body.appendChild(frame);

  await new Promise(resolve => frame.onload = resolve);

  const video = SpecialPowers.wrap(frame).contentDocument.body.childNodes[0];

  video.muted = true;  // to allow playback

  return video.play();

});

</script>