<!DOCTYPE html>
<title>Service Worker: Clients.get</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<script>
function wait_for_clientId() {
  return new Promise(function(resolve, reject) {
    window.onmessage = e => {
      resolve(e.data.clientId);
    };
  });
}

promise_test(async t => {
  // Register service worker.
  const scope = 'resources/clients-get-frame.html';
  const client_ids = [];
  const registration = await service_worker_unregister_and_register(
    t, 'resources/clients-get-worker.js', scope);
  t.add_cleanup(() => registration.unregister());
  await wait_for_state(t, registration.installing, 'activated');

  // Prepare for test cases.
  // Case 1: frame1 which is focused.
  const frame1 = await with_iframe(scope + '#1');
  t.add_cleanup(() => frame1.remove());
  frame1.focus();
  client_ids.push(await wait_for_clientId());
  // Case 2: frame2 which is not focused.
  const frame2 = await with_iframe(scope + '#2');
  t.add_cleanup(() =>  frame2.remove());
  client_ids.push(await wait_for_clientId());
  // Case 3: invalid id.
  client_ids.push('invalid-id');

  // Call clients.get() for each id on the service worker.
  const message_event = await new Promise(resolve => {
    navigator.serviceWorker.onmessage = resolve;
    registration.active.postMessage({clientIds: client_ids});
  });

  const expected = [
    // visibilityState, focused, url, type, frameType
    ['visible', true, normalizeURL(scope) + '#1', 'window', 'nested'],
    ['visible', false, normalizeURL(scope) + '#2', 'window', 'nested'],
    undefined
  ];
  assert_equals(message_event.data.length, 3);
  assert_array_equals(message_event.data[0], expected[0]);
  assert_array_equals(message_event.data[1], expected[1]);
  assert_equals(message_event.data[2], expected[2]);
}, 'Test Clients.get()');

promise_test(async t => {
  // Register service worker.
  const scope = 'resources/simple.html';
  const registration = await service_worker_unregister_and_register(
    t, 'resources/clients-get-resultingClientId-worker.js', scope)
  t.add_cleanup(() =>  registration.unregister());
  await wait_for_state(t, registration.installing, 'activated');
  const worker = registration.active;

  // Load frame within the scope.
  const frame = await with_iframe(scope);
  t.add_cleanup(() => frame.remove());
  frame.focus();

  // Get resulting client id.
  const resultingClientId = await new Promise(resolve => {
    navigator.serviceWorker.onmessage = e => {
      if (e.data.msg == 'getResultingClientId') {
        resolve(e.data.resultingClientId);
      }
    };
    worker.postMessage({msg: 'getResultingClientId'});
  });

  // Query service worker for clients.get(resultingClientId).
  const isResultingClientUndefined = await new Promise(resolve => {
    navigator.serviceWorker.onmessage = e => {
      if (e.data.msg == 'getIsResultingClientUndefined') {
        resolve(e.data.isResultingClientUndefined);
      }
    };
    worker.postMessage({msg: 'getIsResultingClientUndefined',
                        resultingClientId});
  });

  assert_false(
    isResultingClientUndefined,
    'Clients.get(FetchEvent.resultingClientId) resolved with a Client');
}, 'Test successful Clients.get(FetchEvent.resultingClientId)');

promise_test(async t => {
  // Register service worker.
  const scope = 'resources/simple.html?fail';
  const registration = await service_worker_unregister_and_register(
    t, 'resources/clients-get-resultingClientId-worker.js', scope);
  t.add_cleanup(() =>  registration.unregister());
  await wait_for_state(t, registration.installing, 'activated');

  // Load frame, and destroy it while loading.
  const worker = registration.active;
  let frame = document.createElement('iframe');
  frame.src = scope;
  t.add_cleanup(() => {
    if (frame) {
      frame.remove();
    }
  });

  await new Promise(resolve => {
    navigator.serviceWorker.onmessage = e => {
      // The service worker posts a message to remove the iframe during fetch
      // event.
      if (e.data.msg == 'destroyResultingClient') {
        frame.remove();
        frame = null;
        worker.postMessage({msg: 'resultingClientDestroyed'});
        resolve();
      }
    };
    document.body.appendChild(frame);
  });

  resultingDestroyedClientId = await new Promise(resolve => {
    navigator.serviceWorker.onmessage = e => {
      // The worker sends a message back when it receives the message
      // 'resultingClientDestroyed' with the resultingClientId.
      if (e.data.msg == 'resultingClientDestroyedAck') {
        assert_equals(frame, null, 'Frame should be destroyed at this point.');
        resolve(e.data.resultingDestroyedClientId);
      }
    };
  });

  // Query service worker for clients.get(resultingDestroyedClientId).
  const isResultingClientUndefined = await new Promise(resolve => {
    navigator.serviceWorker.onmessage = e => {
      if (e.data.msg == 'getIsResultingClientUndefined') {
        resolve(e.data.isResultingClientUndefined);
      }
    };
    worker.postMessage({msg: 'getIsResultingClientUndefined',
                        resultingClientId: resultingDestroyedClientId });
  });

  assert_true(
    isResultingClientUndefined,
    'Clients.get(FetchEvent.resultingClientId) resolved with `undefined`');
}, 'Test unsuccessful Clients.get(FetchEvent.resultingClientId)');

</script>