media-autoplay.html

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This WPT test may be referenced by the following Test IDs:
- /speculation-rules/prerender/media-autoplay.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Same-origin prerendering can trigger autoplay</title>

<meta name="timeout" content="long">

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

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

<script src="/common/utils.js"></script>

<script src="/common/dispatcher/dispatcher.js"></script>

<script src="../resources/utils.js"></script>

<script src="resources/utils.js"></script>

<body>

<script>

setup(() => assertSpeculationRulesIsSupported());

promise_test(async t => {

  const {exec, activate} = await create_prerendered_page(t);

  await exec(() => {

    const video = document.createElement('video');

    video.src = '/media/A4.mp4';

    video.autoplay = true;

    video.muted = true;

    window.video = video;

    document.body.appendChild(video);

});

  await new Promise(resolve => t.step_timeout(resolve, 500));

  const before_activation = await exec(() => ({

    readyState: video.readyState,

    paused: video.paused,

    currentTime: video.currentTime

  }));

  await activate();

  await new Promise(resolve => t.step_timeout(resolve, 500));

  const after_activation = await exec(() => ({

    readyState: video.readyState,

    paused: video.paused,

    currentTime: video.currentTime

  }));

  assert_equals(before_activation.paused, false);

  assert_equals(before_activation.currentTime, 0);

  assert_equals(after_activation.paused, false);

  assert_greater_than(before_activation.currentTime, 0);

}, "media autoplay should defer playaback");

</script>