### Question:
OvsdbNodeListener extends DataTreeChangeHandler<Node> { @Override protected void onDelete(DataObjectModification<Node> rootNode, InstanceIdentifier<Node> rootIdentifier) { LOG.trace("Not implemented - OVSDB element deleted: {} \n {}", rootIdentifier, rootNode.getDataBefore()); } OvsdbNodeListener(DataBroker dataProvider, IntegrationBridgeSetting brSettings);   }### Answer:
@Test public void testOnDelete() { when(rootNode.getModificationType()).thenReturn(DataObjectModification.ModificationType.DELETE); listener.onDataTreeChanged(changes); }