### Question:
AAIDeleteTasks { public void deleteCollection(BuildingBlockExecution execution) throws Exception { try { ServiceInstance serviceInstance = extractPojosForBB.extractByKey(execution, ResourceKey.SERVICE_INSTANCE_ID); aaiNetworkResources.deleteCollection(serviceInstance.getCollection()); } catch (Exception ex) { logger.error("Exception occurred in AAIDeleteTasks deleteCollection process", ex); exceptionUtil.buildAndThrowWorkflowException(execution, 7000, ex); } }  void deleteVfModule(BuildingBlockExecution execution); void deleteVnf(BuildingBlockExecution execution); void deleteServiceInstance(BuildingBlockExecution execution); void deleteNetwork(BuildingBlockExecution execution); void deleteCollection(BuildingBlockExecution execution); void deleteInstanceGroup(BuildingBlockExecution execution); void deleteVolumeGroup(BuildingBlockExecution execution); void deleteConfiguration(BuildingBlockExecution execution); void deleteInstanceGroupVnf(BuildingBlockExecution execution); void deleteNetworkPolicies(BuildingBlockExecution execution);  }### Answer:
@Test public void deleteCollectionTest() throws Exception { doNothing().when(aaiNetworkResources).deleteCollection(serviceInstance.getCollection()); aaiDeleteTasks.deleteCollection(execution); verify(aaiNetworkResources, times(1)).deleteCollection(serviceInstance.getCollection()); }