<!DOCTYPE html>
<title>ServiceWorkerGlobalScope: ExtendableMessageEvent</title>
<script src='../../resources/testharness.js'></script>
<script src='../../resources/testharnessreport.js'></script>
<script src='../resources/test-helpers.js'></script>
<script>

// This test should be in chromium/ because the spec does not define behavior in
// the case where postMessage() is called from a detached client.
promise_test(function(t) {
    var script = 'resources/empty-worker.js';
    var scope = 'resources/scope/extendable-message-event-from-detached';

    return service_worker_unregister_and_register(t, script, scope)
      .then(function(registration) {
          add_completion_callback(function() { registration.unregister(); });
          return wait_for_state(t, registration.installing, 'activated');
        })
      .then(function() { return with_iframe(scope); })
      .then(function(frame) {
          var worker = frame.contentWindow.navigator.serviceWorker.controller;
          frame.remove();
          assert_throws(
              { name: 'InvalidStateError' },
              function() { worker.postMessage(''); },
              'postMessage on a detached client should throw an exception.');
        });
  }, 'Post an extendable message from a detached client');

</script>