| <!DOCTYPE html> |
| <meta charset="utf-8" /> |
| <meta viewport="width=device-width, initial-scale=1" /> |
| <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 type="module"> |
| import { |
| getOppositeOrientation, |
| makeCleanup, |
| } from "./resources/orientation-utils.js"; |
| |
| promise_test(async (t) => { |
| t.add_cleanup(makeCleanup()); |
| await test_driver.bless("request full screen"); |
| await document.documentElement.requestFullscreen(); |
| const result = await Promise.race([ |
| new Promise((resolve) => { |
| screen.orientation.addEventListener("change", resolve); |
| }), |
| screen.orientation.lock(getOppositeOrientation()) |
| ]); |
| assert_true(result instanceof Event, "Expected an instance of Event"); |
| }, "The 'change' event must fire before the [[orientationPendingPromise]] is resolved."); |
| </script> |
