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<!DOCTYPE html>
<title>Service worker intercepts a navigation and starts prerendering</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>
const uid = token();
const PAGE_URL = `resources/non-existent-page.html?should-intercept&uid=${uid}`;
const WORKER_URL = 'resources/fetch-intercept-worker.js';
setup(() => assertSpeculationRulesIsSupported());
promise_test(async t => {
const registration =
await service_worker_unregister_and_register(t, WORKER_URL, PAGE_URL);
t.add_cleanup(() => registration.unregister());
await wait_for_state(t, registration.installing, 'activated');
const bc = new PrerenderChannel('prerender-channel', uid);
t.add_cleanup(_ => bc.close());
const gotMessage = new Promise(resolve => {
bc.addEventListener('message', e => {
resolve(e.data);
}, {
once: true
});
});
startPrerendering(PAGE_URL);
const result = await gotMessage;
assert_equals(result, 'prerender success');
}, 'navigation should be intercepted by a service worker');
</script>
</body>
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