unit-testing - Apache Camel bean 单元测试

Question

我在我的应用程序中使用 Apache Camel 和 Spring boot。目前我正在进行单元测试。

Java代码

• 数据路由类

  from("direct:getData")
  .routeId("getData")
  .bean(DataService.class, "processData")
  .marshal().json(JsonLibrary.Jackson)
  .end();
  

• 数据服务类

  public Data processData() {
      return new Data("Hello World");
  }
  

• 具有 getter、setter 和 Jackson toString 方法的数据类

  private String value;
  

单元测试

• BaseCamelContextUnitText

  public abstract class BaseCamelContextUnitTest extends CamelTestSupport
  {
       @Autowired
       private DataService dataService;
  
       @Produce
       private ProducerTemplate producerTemplate;
  
       public CamelContext getCamelContext() {
           return camelContext;
       } 
  
       @Override
       protected Context createJndiContext() throws Exception {
           JndiContext context = new JndiContext();
           context.bind("dataService", dataService);
           return context;
       }
  
       @Test
       public void shouldProcessData() throws Exception {
            RouteDefinition routeDef = getCamelContext().getRouteDefinition("getData");
            routeDef.adviceWith((ModelCamelContext) getCamelContext(), new RouteBuilder() {
  
               @Override
               public void configure() throws Exception {
                    from("direct:getData")
                      .pipeline("bean:dataService?method=processData");
               }
       });
  
       getCamelContext().start();
  
       String responseData = "{"
          + "\"value\":\"Unit test success\""
          + "}";
  
       Object response = producerTemplate.sendBody("direct:getData",   ExchangePattern.InOut, null);
  
       ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
  ((InputStreamCache) response).writeTo(byteArrayOutputStream);
  
       assertThat(new String(byteArrayOutputStream.toByteArray()), is(responseData));
       }
    }
  

我如何模拟

   .bean(DataService.class, "processData")

在单元测试中返回一个带有默认字符串变量的模拟数据对象，比如“单元测试成功”，然后测试路由是否会返回模拟对象而不是带有“Hello World”字符串变量的对象？

Answer 1

这似乎是一个迟到的回应，但我遇到了与您的案例中描述的相同的事情，并且我遇到了一种“模拟”bean 步骤的简单方法，即使用 DefaultRegistry 进行注册将模拟的 bean 放入 Camel 注册表中，例如:

@Test
 public void shouldProcessData() throws Exception {
   ...
   ...
   DataService dataService = new DataService(...);
   stubBean("dataService", dataService); // put this before calling context.start();

   context.start();
   ...
   ...
}


/**
 * This method inject a stub bean into the registry
 * @param beanName the name of the bean being injected
 * @param instance the stub instance
 */
void stubBean(String beanName, Object instance) {
    DefaultRegistry registry = context.getRegistry(DefaultRegistry.class);
    registry.bind(beanName, instance);
}