### Question:
KafkaConsumerConfig { @Bean public KafkaConsumerMessageListener listener() { return new KafkaConsumerMessageListener(); }  Map config(); ConsumerFactory<Object, Object> consumerFactory(); @Bean KafkaConsumerMessageListener listener(); @Bean KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<String, String>> kafkaListenerContainerFactory();  }### Answer:
@Test public void testListener() { }