| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script type="module"> |
| import {MockBatteryMonitor} from './resources/mock-battery-monitor.js'; |
| |
| const mock = new MockBatteryMonitor(); |
| |
| function setMainWindowHidden(hidden) { |
| return new Promise(resolve => { |
| document.addEventListener('visibilitychange', resolve, {once: true}); |
| testRunner.setMainWindowHidden(hidden); |
| }); |
| } |
| |
| promise_test(async _ => { |
| mock.setBatteryStatus(false, 10, 20, 0.5); |
| const battery = await navigator.getBattery(); |
| |
| mock.verifyBatteryStatus(battery); |
| |
| const fail = () => { throw new Error('unexpected levelchange event'); }; |
| battery.addEventListener('levelchange', fail); |
| await setMainWindowHidden(true); |
| mock.setBatteryStatus(false, 10, 20, 0.55); |
| battery.removeEventListener('levelchange', fail); |
| |
| const change = |
| new Promise(resolve => battery.addEventListener('levelchange', resolve)); |
| await setMainWindowHidden(false); |
| mock.setBatteryStatus(false, 10, 20, 0.6); |
| await change; |
| |
| mock.verifyBatteryStatus(battery); |
| }, 'battery status events only fire on visible pages'); |
| </script> |
| </body> |
| </html> |
