Spring Cloud Stream Testing with Embedded Kafka Broker Sample
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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](http://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.
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