### Question:
ConsumerGroupConsumerServiceImpl extends AbstractBaseService<ConsumerGroupConsumerEntity> implements ConsumerGroupConsumerService { @Override public void deleteByConsumerIds(List<Long> consumerIds) { consumerGroupConsumerRepository.deleteByConsumerIds(consumerIds); }  @Override List<ConsumerGroupConsumerEntity> getByConsumerGroupIds(List<Long> consumerGroupIds); @Override int deleteUnActiveConsumer(); @Override List<ConsumerGroupConsumerEntity> getByConsumerIds(List<Long> consumerIds); @Override void deleteByConsumerId(long consumerId); @Override void deleteByConsumerIds(List<Long> consumerIds);  }### Answer:
@Test public void deleteByConsumerIdsTest() { doNothing().when(consumerGroupConsumerRepository).deleteByConsumerIds(anyList()); consumerGroupConsumerServiceImpl.deleteByConsumerIds(Arrays.asList(1L)); verify(consumerGroupConsumerRepository).deleteByConsumerIds(anyList()); }