Github user MikeThomsen commented on the issue:
https://github.com/apache/nifi/pull/2553
You should strongly consider setting up some integration tests that can be
run against a simple Docker image. All you have to do with NiFi to get that
done is add a few classes with "IT" at the end of their name and you can run
them with `mvn integration-test -Pintegration-tests`.---
