Lets say i have 3 modules:

1. core-module – core module for project
2. communication-api – api module exposing API’s for communication services
3. communication-msg-impl – concrete implementation for communication-api ( one of few )

Now core-module has dependency to communication-api in base, when using this core-module for concrete project, user adds dependency to one of communication-api‘s implementations to the project.

communication-msg-impl has dependency to communication-api

I want to create test that tests whole flow when core-module uses communication-msg-impl, however this test would need to be in module-core package, since it requires functionality from the module, but that would mean i need to add dependency to communication-msg-impl to it. Which is not wanted behavior.

Is it good practice to create whole different module just for these integration tests?

I can have multiple communication-msg-impl modules ( each for different implementation) so it would mean i would need to create new “testing” module for each implementation.

Thanks for answers