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<!DOCTYPE html>
<title>Service Worker: Clients.matchAll with a prerender page</title>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<body>
<script>
setup(() => assertSpeculationRulesIsSupported());
promise_test(async t => {
const uid = token();
const workerUrl = 'resources/clients-matchall-service-worker.js';
const pageUrl = `resources/prerendered-page.html?uid=${uid}`;
// Start a service worker.
const registration =
await service_worker_unregister_and_register(t, workerUrl, workerUrl);
t.add_cleanup(_ => registration.unregister());
// Observe the message from a prerendered page.
const bc = new PrerenderChannel('prerender-channel', uid);
t.add_cleanup(_ => bc.close());
const messagePromise = new Promise(resolve => {
bc.addEventListener('message', e => {
resolve(e.data);
}, {once:true});
});
startPrerendering(pageUrl);
const result = await messagePromise;
assert_equals(result, 'prerender success');
// The service worker returns the list of client urls exposed by
// Clients#matchAll().
const message = await new Promise(resolve => {
navigator.serviceWorker.onmessage = resolve;
get_newest_worker(registration).postMessage('invoke clients.matchAll()');
});
assert_array_equals(
message.data,
[ window.location.href, new URL(pageUrl, location).toString() ]);
}, 'The client urls (including a prerender page) are exposed by ' +
'Clients#matchAll()');
</script>
</body>
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