### Question:
DropdownMappingUpdater implements PredefinedMappingUpdater { @Override public void updateViewMappings(Collection<PredefinedPendingAttributesForView> viewMappings) { dataSetAdapterBuilder.setDropdownPredefinedMappings(viewMappings); } DropdownMappingUpdater(DataSetAdapterBuilder dataSetAdapterBuilder); @Override void updateViewMappings(Collection<PredefinedPendingAttributesForView> viewMappings);  }### Answer:
@Test public void whenUpdateViewMappings_thenSetDropdownPredefinedPendingAttributesForViewGroupOnDataSetAdapterBuilder() { DropdownMappingUpdater updater = new DropdownMappingUpdater(dataSetAdapterBuilder); updater.updateViewMappings(viewMappings); verify(dataSetAdapterBuilder).setDropdownPredefinedMappings(viewMappings); }