speculation-rules/prerender/resources/wake-lock.https.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>
<script>

const params = new URLSearchParams(location.search);

// The main test page (restriction-wake-lock.https.html) loads the
// initiator page, then the initiator page will prerender itself with the
// `prerendering` parameter.
const isPrerendering = params.has('prerendering');

if (!isPrerendering) {
  loadInitiatorPage();
} else {
  const prerenderEventCollector = new PrerenderEventCollector();
  const promise = new Promise((resolve, reject) => {
    navigator.wakeLock.request('screen')
      .then(() => {
        reject('unexpected success');
      })
      .catch((e) => {
        prerenderEventCollector.addEvent('navigator.wakeLock.request failed');
      });

    document.addEventListener('prerenderingchange', () => {
      prerenderEventCollector.addEvent(
        'requesting navigator.wakeLock.request on prerendering change');
      navigator.wakeLock.request('screen')
        .then(function() {
          lock => lock.release(); resolve();
        });
    });
  });
  prerenderEventCollector.start(promise, 'navigator.wakeLock.request test');
}

</script>