remote-playback/watch-availability-initial-callback.html

<!DOCTYPE html>
<html>
<title>Test that the callback is called once watchAvailability() resolves.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/media.js"></script>
<script>
async_test(t => {
  var v = document.createElement('video');
  v.src = getVideoURI('/media/movie_5');

  var promiseResolved = false;

  function callback(available) {
    assert_true(promiseResolved);
  }

  v.remote.watchAvailability(t.step_func_done(callback)).then(
    t.step_func(() => { promiseResolved = true; }), t.unreached_func());
}, 'Test that the callback is called once watchAvailability() resolves.');
</script>
</html>