I'm struggling to understand how I should go about testing an application that makes use of Kafka Binder while also using Spring Cloud function.
Let's use this very simple example:
@SpringBootApplication
public class DemoKafkaApplication {
public static void main(String[] args) {
SpringApplication.run(DemoKafkaApplication.class, args);
}
@Bean
public Function<String, String> uppercase() {
return value -> value.toUpperCase();
}
}
And on my application.yaml:
spring.cloud:
stream:
function:
definition: uppercase
bindings:
uppercase-in-0:
destination: uppercase-topic
How would I go about testing this? If I were using @StreamListener and a Channels list, I would do something like this:
channels.uppercase().send(MessageBuilder.withPayload("test").build());
messageCollector.forChannel(channels.uppercaseOutput()).poll(5, TimeUnit.SECONDS);
However, for Spring Cloud Function that is not the case. Any help is very much welcome as I can't find anything in the offical docs or samples!
