test_dynamic_pref_change.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test Screen Wake Lock responds to dynamic pref changes</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>

  <script type="application/javascript">

    /* globals SpecialPowers */

    'use strict';

    function spinEventLoop() {

        return new Promise(resolve => {

            setTimeout(resolve, 0);

});

    add_task(async function my_test() {

      const lock = await navigator.wakeLock.request("screen");

      await SpecialPowers.pushPrefEnv({

        set: [["dom.screenwakelock.enabled", false]],

});

      await spinEventLoop();

      ok(lock.released, "Lock was released once pref was deactivated");

      await SpecialPowers.popPrefEnv();

});

  </script>

</head>

<body>

<p id="display"></p>

<div id="content" style="display: none"></div>

<pre id="test"></pre>

</body>

</html>