@Test
public void testStart_setsAdUiViewGroup() {

  setupPlayback(CONTENT_TIMELINE, PREROLL_ADS_DURATIONS_US, PREROLL_CUE_POINTS_SECONDS);
  imaAdsLoader.start(adsLoaderListener, adViewProvider);
  verify(adDisplayContainer, atLeastOnce()).setAdContainer(adViewGroup);
  verify(adDisplayContainer, atLeastOnce()).registerVideoControlsOverlay(adOverlayView);
}