| <!DOCTYPE HTML> |
| <body> |
| <head> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <script> |
| function waitForMessage(data) { |
| return new Promise( |
| resolve => { |
| window.addEventListener('message', e => { |
| if (e.data == data) { |
| resolve(); |
| } |
| }, {once: true}); |
| }); |
| } |
| |
| promise_test(async _ => { |
| const w = window.open('resources/window-postmessage-open-close.html'); |
| await waitForMessage('opened'); |
| |
| const nav = w.navigator; |
| let result = nav.getBattery(); |
| assert_equals(typeof result, 'object'); |
| assert_equals(result.constructor, w.Promise); |
| |
| w.close(); |
| await waitForMessage('closed'); |
| result = nav.getBattery(); |
| assert_equals(result, undefined); |
| }, 'navigator.getBattery() does not operate on a closed window'); |
| </script> |
| </body> |
