| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script> |
| promise_test(async t => { |
| t.add_cleanup(async () => { |
| try { |
| await document.exitFullscreen(); |
| } catch (e) {} |
| screen.orientation.unlock(); |
| }); |
| await test_driver.bless("request full screen", () => { |
| return document.documentElement.requestFullscreen(); |
| }); |
| |
| const promiseToChange = new Promise(resolve => { |
| screen.orientation.addEventListener("change", resolve); |
| }); |
| |
| const result = await Promise.race([ |
| screen.orientation.lock("landscape"), |
| promiseToChange, |
| ]); |
| |
| assert_true(result instanceof Event, "Expected an instance of Event"); |
| }, "The 'change' event must fire before the [[orientationPendingPromise]] is resolved."); |
| </script> |
