@Test
  public void testRendersHeadPointer() throws IOException {
    lifeCycleAdapter.preserveValues(video);

    video.stepToTime(23);
    lifeCycleAdapter.renderChanges(video);

    JsonObject properties = MessageUtil.getOperationProperties(WidgetUtil.getId(video), SET, null);
    assertEquals(23, properties.get(keyForEnum(PlaybackOptions.HEAD_POSITION)).asInt());
  }