<!DOCTYPE HTML> <html> <head> <title>Test for Battery API</title> <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/> </head> <body> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script type="application/javascript"> "use strict"; SimpleTest.waitForExplicitFinish(); /** Test for Battery API **/ navigator.getBattery().then(function (battery) { ok(battery.level >= 0.0 && battery.level <= 1.0, "Battery level " + battery.level + " should be in the range [0.0, 1.0]"); SpecialPowers.pushPrefEnv({"set": [["dom.battery.test.charging", true]]}, function () { is(battery.charging, true, "Battery should be charging"); ok(battery.chargingTime >= 0, "Battery chargingTime " + battery.chargingTime + " should be nonnegative when charging"); is(battery.dischargingTime, Infinity, "Battery dischargingTime should be Infinity when charging"); SimpleTest.finish(); }); }); </script> </pre> </body> </html>