navigationPreload.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /service-workers/service-worker/navigation-preload/navigationPreload.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>ServiceWorker: navigator.serviceWorker.navigationPreload</title>

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

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

<script src="../resources/test-helpers.sub.js"></script>

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

<script>

promise_test(async t => {

  const SCRIPT = '../resources/empty-worker.js';

  const SCOPE = '../resources/navigationpreload';

  const registration =

      await service_worker_unregister_and_register(t, SCRIPT, SCOPE);

  const navigationPreload = registration.navigationPreload;

  assert_true(navigationPreload instanceof NavigationPreloadManager,

              'ServiceWorkerRegistration.navigationPreload');

  await registration.unregister();

}, "The navigationPreload attribute must return service worker " +

    "registration's NavigationPreloadManager object.");

</script>