no-leak-on-detached-use.https.html

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /battery-status/no-leak-on-detached-use.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

</head>

<body>

<script>

function waitForMessage(data) {

  return new Promise(

      resolve => {

        window.addEventListener('message', e => {

          if (e.data == data) {

            resolve();

        }, {once: true});

});

promise_test(async t => {

  const w = window.open('resources/window-postmessage-open-close.html');

  await waitForMessage('opened');

  const nav = w.navigator;

  let result = nav.getBattery();

  assert_equals(typeof result, 'object');

  assert_equals(result.constructor, w.Promise);

  w.close();

  await waitForMessage('closed');

  result = nav.getBattery();

  assert_equals(result, undefined);

}, 'navigator.getBattery() does not operate on a closed window');

promise_test(async t => {

  const iframe = document.createElement('iframe');

  iframe.srcdoc = '<html></html>';

  document.body.appendChild(iframe);

  const frameNav = iframe.contentWindow.navigator;

  document.body.removeChild(iframe);

  const battery = await frameNav.getBattery();

  assert_equals(battery, undefined);

}, 'navigator.getBattery() on a detached frame does not leak or crash');

</script>

</body>

</html>