如何为 Spring 集成 dsl 配置类编写 Junit 5 测试用例

Question

在这里，我使用 Scatter-gather 模式并并行调用 3 个子流。 然后收集它们并聚合它们。 我需要为配置类、网关和控制器编写 junit 测试用例。 我是 Spring Integration 的新手，所以请帮我解决这个问题。

代码如下 -

//配置类

 @Configuration
    public class IntegrationConfiguration {
      @Autowired LoansServiceImpl loansService;
    
      long dbId = new SequenceGenerator().nextId();
  //   Main flow
  @Bean
  public IntegrationFlow flow() {
    return flow ->
        flow.split()
            .log()
            .channel(c -> c.executor(Executors.newCachedThreadPool()))
            .convert(LoanProvisionRequest.class)
            .scatterGather(
                scatterer ->
                    scatterer
                        .applySequence(true)
                        .recipientFlow(flow1())
                        .recipientFlow(flow2())
                        .recipientFlow(flow3()),
                gatherer -> gatherer.releaseLockBeforeSend(true))
            .log()
            .aggregate(a -> a.outputProcessor(MessageGroup::getMessages))
            .channel("output-flow");
  }
  //   flow1
  @Bean
  public IntegrationFlow flow1() {
    return integrationFlowDefination ->
        integrationFlowDefination
            .channel(c -> c.executor(Executors.newCachedThreadPool()))
            .handle(
                message -> {
                  try {
                    lionService.saveLionRequest(
                        (LionRequest) message.getPayload(), String.valueOf(dbId));
                  } catch (JsonProcessingException e) {
                    throw new RuntimeException(e);
                  }
                });
  }

  //   flow2
  @Bean
  public IntegrationFlow flow2() {
    return integrationFlowDefination ->
        integrationFlowDefination
            .channel(c -> c.executor(Executors.newCachedThreadPool()))
            .handle(
                message ->
                    lionService.getData(
                        (LionRequest) message.getPayload(), SourceSystem.PROVISION))
            .log();
  }

  //  flow3
  @Bean
  public IntegrationFlow flow3() {
    return integrationFlowDefination ->
        integrationFlowDefination
            .channel(c -> c.executor(Executors.newCachedThreadPool()))
            .handle(
                message ->
                    lionService.prepareCDRequest(
                        (LionRequest) message));
  }

  @Bean
  public MessageChannel replyChannel() {
    return MessageChannels.executor("output-flow", outputExecutor()).get();
  }

  @Bean
  public ThreadPoolTaskExecutor outputExecutor() {
    ThreadPoolTaskExecutor pool = new ThreadPoolTaskExecutor();
    pool.setCorePoolSize(4);
    pool.setMaxPoolSize(4);
    return pool;
  }
}

//网关接口

@MessagingGateway
public interface LionGateway {

  @Gateway(requestChannel = "flow.input", replyChannel = "output-flow")
  List<?> echo(LionRequest lionRequest);
}

//控制器类

@Autowired private LionGateway lionGateway;

 @PostMapping(value = "/invoke-integration")
  public String invokeIntegrationFlow(@RequestBody LionRequest lionRequest) {
    String response = lionGateway.echo(lionRequest).toString();
    return response;
  }

Answer 1

@Configuration测试不需要：它只是注册 bean。 因此，您可能只需要在测试中专注于与这些 bean 的交互。

您可以通过 MockMvc 测试的Controller ： https ://docs.spring.io/spring-framework/docs/current/reference/html/testing.html#spring-mvc-test-framework。

可能@MessagingGateway可能只是被控制器测试所覆盖，因为看起来您只是从该@PostMapping方法中调用它。

要测试 Spring Integration 端点，您需要确定您想要的粒度。 但可能我们的带有MockIntegration的测试框架可以帮助您： https ://docs.spring.io/spring-integration/docs/current/reference/html/testing.html#test-context