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<!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="session-storage-utils.js"></script>
<script>
const params = new URLSearchParams(location.search);
const uid = params.get('uid');
RunSessionStorageTest(async (isPrerendering, url, prerenderChannel, done) => {
if (!isPrerendering) {
sessionStorage.setItem('set by initiator page 1', '1');
startPrerendering(url);
// Wait for the message from the prerendering page.
assert_equals(
await getNextMessage(prerenderChannel),
'From prerendering page 1')
// Add an item to the session storage.
sessionStorage.setItem('set by initiator page 2', '1');
// Send the message to the prerendering page.
prerenderChannel.postMessage('From initiator page');
// Wait for the message from the prerendering page.
assert_equals(
await getNextMessage(prerenderChannel),
'From prerendering page 2')
// Register beforeunload event handler which adds a new item in the
// session storage.
window.addEventListener('beforeunload', () => {
sessionStorage.setItem('set by initiator page 3', '1');
});
// Navigate to the prerenderered page.
window.location = url;
} else {
const prerenderingchangePromise =
new Promise(resolve => {
document.addEventListener('prerenderingchange', () => {
sessionStorage.setItem('set by activated page', 1);
resolve();
});
});
sessionStorage.setItem('set by prerendering page', '1');
// Send the message to the initiator page.
prerenderChannel.postMessage('From prerendering page 1');
// Wait for the message from the initiator page.
assert_equals(await getNextMessage(prerenderChannel),
'From initiator page');
assert_equals(
getSessionStorageKeys(),
'set by initiator page 1, set by prerendering page',
'The session storage item added by the initiator page after ' +
'starting prerendering must not be visible in the prerendering ' +
'page.');
// Send the message to the initiator page.
prerenderChannel.postMessage('From prerendering page 2');
// Wait until activated.
await prerenderingchangePromise;
assert_equals(
getSessionStorageKeys(),
'set by activated page, set by initiator page 1, ' +
'set by initiator page 2, set by initiator page 3',
'The all session storage items added by the initiator page and ' +
'the item added by the activated page must be visible in the ' +
'activated page.');
done();
}
}, uid);
</script>