### Question:
EndpointsListener implements ClusteredDataTreeChangeListener<AddressEndpoint> { @Override public void onDataTreeChanged(Collection<DataTreeModification<AddressEndpoint>> changes) { listener.onEndpointsChange(changes); } EndpointsListener(DataBroker dataBroker, NeLocationProvider listener); @Override void onDataTreeChanged(Collection<DataTreeModification<AddressEndpoint>> changes); void close();  }### Answer:
@Test public void test_ListenerNotification() { endpointsListener.onDataTreeChanged(null); verify(listener).onEndpointsChange(any()); }