<!DOCTYPE html>
<title>Service Worker: registration events</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<script>
promise_test(function(t) {
    var scope = 'resources/in-scope/';
    return service_worker_unregister_and_register(
        t, 'resources/events-worker.js', scope)
      .then(function(registration) {
          t.add_cleanup(function() {
              return service_worker_unregister(t, scope);
          });

          return onRegister(registration.installing);
        });

    function sendMessagePort(worker, from) {
        var messageChannel = new MessageChannel();
        worker.postMessage({from:from, port:messageChannel.port2}, [messageChannel.port2]);
        return messageChannel.port1;
    }

    function onRegister(sw) {
        return new Promise(function(resolve) {
            sw.onstatechange = function() {
                if (sw.state === 'activated')
                    resolve();
            };
        }).then(function() {
            return new Promise(function(resolve) {
                sendMessagePort(sw, 'registering doc').onmessage = resolve;
            });
        }).then(function(e) {
                assert_array_equals(e.data.events,
                                    ['install', 'activate'],
                                   'Worker should see install then activate events');
        });
    }
}, 'Registration: events');
</script>