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<!DOCTYPE html>
<html>
<link rel="author" href="mailto:caseq@chromium.org">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1348019">
<title>Releasing wake locks upon visibility change does not cause crash if an iframe is appended in event listener</title>
<body>
<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 src="/page-visibility/resources/window_state_context.js"></script>
<script>
'use strict';
promise_test(async t => {
await test_driver.set_permission({ name: 'screen-wake-lock' }, 'granted');
const { minimize } = window_state_context(t);
const screenLock = await navigator.wakeLock.request('screen');
assert_false(screenLock.released, "The released attribute is initially false");
screenLock.addEventListener('release', () => {
const iframe = document.createElement('iframe');
iframe.src = 'about:blank';
document.body.appendChild(iframe);
});
const release = new EventWatcher(t, screenLock, 'release').wait_for('release');
await Promise.all([minimize(), release]);
assert_true(screenLock.released, "The released attribute is true after the lock is released");
}, "Appending iframe in release event listener does not cause a crash when page visibility changes");
</script>
</body>
</html>
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