As I'm developing a Kafka Streams application, I ended up copying the content of streams/src/test/java/org/apache/kafka/test/ into my project in order to use the KStreamTestDriver and associated functionality in tests, which is working really well.
Would the Kafka team to open to refactoring these fixtures to be a separate package, perhaps moving the source into a new streams/test-fixtures/src/main and adding appropriate configuration to the gradle build to pull in that package as a test dependency where needed and to publish it as a separate artifact? If there's interest in this, I would submit a PR.
