Wait for ExecutorChannel to finish in junit

Question

I am using spring integration and junit.

 @Test public void testOnePojo() throws Exception { ExecutorChannel orderSendChannel = context.getBean("validationChannel", ExecutorChannel.class); ExecutorChannel orderReceiveChannel = context.getBean("auditChannel", ExecutorChannel.class); orderReceiveChannel.subscribe(t -> { System.out.println(t);//I want to see this output }); orderSendChannel.send(getMessageMessage()); }

I cannot see the output from the receiving channel. JUnit exits after subscribing. It there a proper way to wait inside testOnePojo until auditChannel receives a response.

Answer 1

you can use a CoundDownLatch in your test and wait for the MessageHandler to handle your message. Your example would look something like this:

 @Test public void testOnePojo() throws Exception { final CountDownLatch countDownLatch = new CountDownLatch(1); ExecutorChannel orderSendChannel = context.getBean("validationChannel", ExecutorChannel.class); ExecutorChannel orderReceiveChannel = context.getBean("auditChannel", ExecutorChannel.class); orderReceiveChannel.subscribe(t -> { System.out.println(t);//I want to see this output countDownLatch.countDown(); }); orderSendChannel.send(getMessageMessage()); countDownLatch.await(); }