Spring Cloud Stream Testing with Embedded Kafka Broker Sample ============================================================== In this *Spring Cloud Stream* sample, an embedded kafka broker is used for testing. ## Requirements To run this sample, you will need to have installed: * Java 8 or Above ## Code Tour This sample is a Spring Boot application that uses Spring Cloud Stream to receive a `String` message and forward an upper case version of that String; it uses the Kafka binder. * EmbeddedKafkaApplication - the Spring Boot Main Application * EmbeddedKafkaApplicationTests - the test case The `spring-kafka-test` dependency added to the `pom.xml` puts the `KafkaEmbedded` JUnit `@Rule` on the class path. Refer to the [Spring for Apache Kafka Reference Manual](https://docs.spring.io/spring-kafka/reference/htmlsingle/#testing) for more information about this. Notice how the `@BeforeClass` method sets up the Boot and binder properties to locate the servers. See the test method for the details on interacting with Embedded Kafka. The test method starts by sending a message to the input destination. It then creates a consumer to consume from the output destination; gets the output message and asserts that it's an upper case version of the sent message. ## Building with Maven Build the sample and run the test by executing: `./mvnw clean package` or run the test in your favorite IDE.