<!
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>
