event-before-promise.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /screen-orientation/event-before-promise.html - WPT Dashboard Interop Dashboard

<!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>