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

    video.fastBackward(-2);
    lifeCycleAdapter.renderChanges(video);

    JsonObject properties = MessageUtil.getOperationProperties(WidgetUtil.getId(video), SET, null);
    assertEquals(-2, properties.get(keyForEnum(PlaybackOptions.SPEED)).asDouble(), 0);
  }