In order to run the test-suite, you should have an instance of rabbitmq running on your local machine. (you can use a remote instance, too). You'll need to set your configuration in core/src/test/resources/application.conf. Default configuration can be copied, as follows:
cp core/src/test/resources/application.conf.default core/src/test/resources/application.conf
The entire suite (including all modules), is run by issuing the following:
sbt test
To test a single module, such as akka-stream, run the following:
sbt akka-stream/test