### Question:
ConsumerGroupServiceImpl extends AbstractBaseService<ConsumerGroupEntity> implements CacheUpdateService, ConsumerGroupService, TimerService { @Override public List<ConsumerGroupTopicEntity> getGroupTopic() { return consumerGroupTopicService.getList(); }  @Override void start(); @Override void updateCache(); @Override void forceUpdateCache(); @Override List<ConsumerGroupEntity> getLastMetaConsumerGroup(long minMessageId, long maxMessageId); @Override List<ConsumerGroupEntity> getLastRbConsumerGroup(long minMessageId, long maxMessageId); @Override // @Transactional(rollbackFor = Exception.class) void rb(List<QueueOffsetEntity> queueOffsetEntities); @Override void notifyRb(long id); @Override void notifyRb(List<Long> ids); @Override void notifyMeta(long id); @Override void notifyMeta(List<Long> ids); @Override Map<String, ConsumerGroupEntity> getByNames(List<String> names); @Override Map<String, ConsumerGroupEntity> getCache(); @Override Map<Long, ConsumerGroupEntity> getIdCache(); @Override List<String> getSubEnvList(); @Override void notifyOffset(long id); @Override List<ConsumerGroupTopicEntity> getGroupTopic(); @Override ConsumerGroupTopicEntity getTopic(String consumerGroupName, String topicName); @PreDestroy @Override void stop(); @Override List<ConsumerGroupEntity> getByOwnerNames(Map<String, Object> parameterMap); @Override long countByOwnerNames(Map<String, Object> parameterMap); @Override String info(); @Override void notifyRbByNames(List<String> consumerGroupNames); @Override String getCacheJson(); @Override ConsumerGroupCreateResponse createConsumerGroup(ConsumerGroupCreateRequest consumerGroupCreateRequest); @Override ConsumerGroupEditResponse editConsumerGroup(ConsumerGroupEntity consumerGroupEntity); @Override ConsumerGroupDeleteResponse deleteConsumerGroup(long consumerGroupId, boolean checkOnline); @Override BaseUiResponse<Void> addTopicNameToConsumerGroup(ConsumerGroupTopicEntity consumerGroupTopicEntity); @Override BaseUiResponse<Void> deleteTopicNameFromConsumerGroup(ConsumerGroupTopicEntity consumerGroupTopicEntity); @Override @Transactional(rollbackFor = Exception.class, propagation= Propagation.NESTED) void copyAndNewConsumerGroup(ConsumerGroupEntity consumerGroupEntityOld,
			ConsumerGroupEntity consumerGroupEntityNew); @Override Map<String, ConsumerGroupEntity> getData();  }### Answer:
@Test public void getGroupTopicTest() { consumerGroupServiceImpl.getGroupTopic(); verify(consumerGroupTopicService).getList(); }