我真的很難編寫一個測試來檢查當消息發送到它的指定主題時我的 Kafka 消費者是否被正確調用。我的消費者：@Service@Slf4j@AllArgsConstructor(onConstructor = @__(@Autowired))public class ProcessingConsumer {  private AppService appService;  @KafkaListener(      topics = "${topic}",      containerFactory = "processingConsumerContainerFactory")  public void listen(ConsumerRecord<Key, Value> message, Acknowledgment ack) {    try {      appService.processMessage(message);      ack.acknowledge();    } catch (Throwable t) {      log.error("error while processing message!", t);    }  }}我的消費者配置：@EnableKafka@Configurationpublic class ProcessingCosumerConfig {  @Value("${spring.kafka.schema-registry-url}")  private String schemaRegistryUrl;  private KafkaProperties props;  public ProcessingCosumerConfig(KafkaProperties kafkaProperties) {    this.props = kafkaProperties;  }  public Map<String, Object> deserializerConfigs() {    Map<String, Object> props = new HashMap<>();    props.put(KafkaAvroDeserializerConfig.SPECIFIC_AVRO_READER_CONFIG, true);    props.put(KafkaAvroDeserializerConfig.SCHEMA_REGISTRY_URL_CONFIG, schemaRegistryUrl);    return props;  }  private KafkaAvroDeserializer getKafkaAvroDeserializer(Boolean isKey) {    KafkaAvroDeserializer kafkaAvroDeserializer = new KafkaAvroDeserializer();    kafkaAvroDeserializer.configure(deserializerConfigs(), isKey);    return kafkaAvroDeserializer;  }  private DefaultKafkaConsumerFactory consumerFactory() {    return new DefaultKafkaConsumerFactory<>(        props.buildConsumerProperties(),        getKafkaAvroDeserializer(true),        getKafkaAvroDeserializer(false));  }