### Question:
RocketMQAutoConfiguration { @Bean @ConditionalOnMissingBean(DefaultMQProducer.class) @ConditionalOnProperty(prefix = "rocketmq", value = {"name-server", "producer.group"}) public DefaultMQProducer defaultMQProducer(RocketMQProperties rocketMQProperties) { RocketMQProperties.Producer producerConfig = rocketMQProperties.getProducer(); String nameServer = rocketMQProperties.getNameServer(); String groupName = producerConfig.getGroup(); Assert.hasText(nameServer, "[rocketmq.name-server] must not be null"); Assert.hasText(groupName, "[rocketmq.producer.group] must not be null"); String accessChannel = rocketMQProperties.getAccessChannel(); String ak = rocketMQProperties.getProducer().getAccessKey(); String sk = rocketMQProperties.getProducer().getSecretKey(); boolean isEnableMsgTrace = rocketMQProperties.getProducer().isEnableMsgTrace(); String customizedTraceTopic = rocketMQProperties.getProducer().getCustomizedTraceTopic(); DefaultMQProducer producer = RocketMQUtil.createDefaultMQProducer(groupName, ak, sk, isEnableMsgTrace, customizedTraceTopic); producer.setNamesrvAddr(nameServer); if (!StringUtils.isEmpty(accessChannel)) { producer.setAccessChannel(AccessChannel.valueOf(accessChannel)); } producer.setSendMsgTimeout(producerConfig.getSendMessageTimeout()); producer.setRetryTimesWhenSendFailed(producerConfig.getRetryTimesWhenSendFailed()); producer.setRetryTimesWhenSendAsyncFailed(producerConfig.getRetryTimesWhenSendAsyncFailed()); producer.setMaxMessageSize(producerConfig.getMaxMessageSize()); producer.setCompressMsgBodyOverHowmuch(producerConfig.getCompressMessageBodyThreshold()); producer.setRetryAnotherBrokerWhenNotStoreOK(producerConfig.isRetryNextServer()); return producer; }  @PostConstruct void checkProperties(); @Bean @ConditionalOnMissingBean(DefaultMQProducer.class) @ConditionalOnProperty(prefix = "rocketmq", value = {"name-server", "producer.group"}) DefaultMQProducer defaultMQProducer(RocketMQProperties rocketMQProperties); @Bean(destroyMethod = "destroy") @ConditionalOnBean(DefaultMQProducer.class) @ConditionalOnMissingBean(name = ROCKETMQ_TEMPLATE_DEFAULT_GLOBAL_NAME) RocketMQTemplate rocketMQTemplate(DefaultMQProducer mqProducer,
        RocketMQMessageConverter rocketMQMessageConverter); static final String ROCKETMQ_TEMPLATE_DEFAULT_GLOBAL_NAME; }### Answer:
@Test public void testDefaultMQProducer() { runner.withPropertyValues("rocketmq.name-server=127.0.0.1:9876", "rocketmq.producer.group=spring_rocketmq"). run((context) -> { assertThat(context).hasSingleBean(DefaultMQProducer.class); }); }