如何创建嵌入春季云流中的卡夫卡单元测试

Question

对不起，这个问题太普通，但有人对如何与卡夫卡嵌入式执行生产者和消费者测试的一些教程或指南。我已经试了，但也有依赖的几个版本，并没有实际工作= /

我使用的是春天的云流卡夫卡。

Answer 1

我们一般建议使用在测试Test Binder但如果你想使用嵌入式卡夫卡服务器，这是可以做到...

添加到您的POM ...

<dependency>
    <groupId>org.springframework.kafka</groupId>
    <artifactId>spring-kafka-test</artifactId>
    <scope>test</scope>
</dependency>

测试应用程序...

@SpringBootApplication
@EnableBinding(Processor.class)
public class So43330544Application {

    public static void main(String[] args) {
        SpringApplication.run(So43330544Application.class, args);
    }

    @StreamListener(Processor.INPUT)
    @SendTo(Processor.OUTPUT)
    public byte[] handle(byte[] in){
        return new String(in).toUpperCase().getBytes();
    }

}

application.properties...

spring.cloud.stream.bindings.output.destination=so0544out
spring.cloud.stream.bindings.input.destination=so0544in
spring.cloud.stream.bindings.output.producer.headerMode=raw
spring.cloud.stream.bindings.input.consumer.headerMode=raw
spring.cloud.stream.bindings.input.group=so0544

测试用例...

@RunWith(SpringRunner.class)
@SpringBootTest
public class So43330544ApplicationTests {

    @ClassRule
    public static KafkaEmbedded embeddedKafka = new KafkaEmbedded(1);

    @Autowired
    private KafkaTemplate<byte[], byte[]> template;

    @Autowired
    private KafkaProperties properties;

    @BeforeClass
    public static void setup() {
        System.setProperty("spring.kafka.bootstrap-servers", embeddedKafka.getBrokersAsString());
    }

    @Test
    public void testSendReceive() {
        template.send("so0544in", "foo".getBytes());
        Map<String, Object> configs = properties.buildConsumerProperties();
        configs.put(ConsumerConfig.GROUP_ID_CONFIG, "test0544");
        configs.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
        ConsumerFactory<byte[], byte[]> cf = new DefaultKafkaConsumerFactory<>(configs);
        Consumer<byte[], byte[]> consumer = cf.createConsumer();
        consumer.subscribe(Collections.singleton("so0544out"));
        ConsumerRecords<byte[], byte[]> records = consumer.poll(10_000);
        consumer.commitSync();
        assertThat(records.count()).isEqualTo(1);
        assertThat(new String(records.iterator().next().value())).isEqualTo("FOO");
    }

}