<!DOCTYPE html>
<title>Service Worker: update with missing importScripts</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<script src="/common/utils.js"></script>
<body>
<script>
/**
 * Test ServiceWorkerRegistration.update() when importScripts in a service worker
 * script is no longer available (but was initially).
 */
let registration = null;

promise_test(async (test) => {
  const script = `resources/update-missing-import-scripts-main-worker.py?key=${token()}`;
  const scope = 'resources/update-missing-import-scripts';

  registration = await service_worker_unregister_and_register(test, script, scope);

  add_completion_callback(() => { registration.unregister(); });

  await wait_for_state(test, registration.installing, 'activated');
}, 'Initialize global state');

promise_test(test => {
  return new Promise(resolve => {
    registration.addEventListener('updatefound', resolve);
    registration.update();
  });
}, 'Update service worker with new script that\'s missing importScripts()');
</script>
</body>