test_dynamic_pref_change.html (953B)
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>Test Screen Wake Lock responds to dynamic pref changes</title> 6 <script src="/tests/SimpleTest/SimpleTest.js"></script> 7 <link rel="stylesheet" href="/tests/SimpleTest/test.css"/> 8 <script type="application/javascript"> 9 /* globals SpecialPowers */ 10 'use strict'; 11 12 function spinEventLoop() { 13 return new Promise(resolve => { 14 setTimeout(resolve, 0); 15 }); 16 } 17 18 add_task(async function my_test() { 19 const lock = await navigator.wakeLock.request("screen"); 20 await SpecialPowers.pushPrefEnv({ 21 set: [["dom.screenwakelock.enabled", false]], 22 }); 23 await spinEventLoop(); 24 ok(lock.released, "Lock was released once pref was deactivated"); 25 await SpecialPowers.popPrefEnv(); 26 }); 27 </script> 28 </head> 29 <body> 30 <p id="display"></p> 31 <div id="content" style="display: none"></div> 32 <pre id="test"></pre> 33 </body> 34 </html>