    @Test
    public void testDefaultMQProducer() {

        runner.withPropertyValues("spring.rocketmq.name-server=127.0.0.1:9876",
            "spring.rocketmq.producer.group=spring_rocketmq").
            run((context) -> {
                assertThat(context).hasSingleBean(DefaultMQProducer.class);
            });

    }