service-worker-client-postmessage.https.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/back-forward-cache/service-worker-client-postmessage.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<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="/common/dispatcher/dispatcher.js"></script>

<script src="resources/helper.sub.js"></script>

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

<script>

// When a service worker is unregistered when a controlled page is in BFCache,

// the page can be still restored from BFCache and remain controlled by the

// service worker.

promise_test(async t => {

  // Register a service worker and make this page controlled.

  const workerUrl =

      'resources/service-worker.js?pipe=header(Service-Worker-Allowed,../)';

  const registration =

      await service_worker_unregister_and_register(t, workerUrl, './');

  t.add_cleanup(_ => registration.unregister());

  await wait_for_state(t, registration.installing, 'activated');

  const controllerChanged = new Promise(

      resolve => navigator.serviceWorker.oncontrollerchange = resolve);

  await claim(t, registration.active);

  await controllerChanged;

  const pageA = new RemoteContext(token());

  const pageB = new RemoteContext(token());

  const urlA = location.origin + executorPath + pageA.context_id;

  const urlB = originCrossSite + executorPath + pageB.context_id;

  // Open `urlA`.

  window.open(urlA, '_blank', 'noopener');

  await pageA.execute_script(waitForPageShow);

  assert_true(

    await pageA.execute_script(

        () => (navigator.serviceWorker.controller !== null)),

    'pageA should be controlled before navigation');

  await storeClients(t, registration.active);

  // Navigate to `urlB`.

  await pageA.execute_script(

    (url) => prepareNavigation(() => {

      location.href = url;

}),

    [urlB]);

  await pageB.execute_script(waitForPageShow);

  // Posting a message to a client should evict it from the bfcache.

  await postMessageToStoredClients(t, registration.active);

  // Back navigate and check whether the page is restored from BFCache.

  await pageB.execute_script(

    () => {

      prepareNavigation(() => { history.back(); });

);

  await pageA.execute_script(waitForPageShow);

  await assert_not_bfcached(pageA);

  await pageA.execute_script(() => navigator.serviceWorker.ready);

  assert_true(

    await pageA.execute_script(

        () => (navigator.serviceWorker.controller !== null)),

    'pageA should be controlled after history navigation');

}, 'Client.postMessage while a controlled page is in BFCache');

</script>