<!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 {
    attachIframe,
    getOppositeOrientation,
  } from "./resources/orientation-utils.js";

  promise_test(async (t) => {
    await test_driver.bless("request full screen");
    await document.documentElement.requestFullscreen();
    screen.orientation.addEventListener(
      "change",
      async () => {
        await screen.orientation.lock(getOppositeOrientation());
      },
      { once: true }
    );
    await screen.orientation.lock(getOppositeOrientation());
  }, "Re-locking the screen orientation after a change event fires must not abort");

  promise_test(async (t) => {
    await test_driver.bless("request full screen");
    await document.documentElement.requestFullscreen();
    screen.orientation.onchange = async () => {
      screen.orientation.onchange = null;
      screen.orientation.unlock();
    };
    await screen.orientation.lock(getOppositeOrientation());
  }, "Unlocking the screen orientation after a change event must not abort");
</script>
