How to add simple JUnit tests to m2e module

[kwin]

Tycho perfectly supports tests with JUnit running inside Eclipse. I am wondering, though what is the best approach for plain JUnit test cases which don't require an OSGi runtime. Several options come to my mind:

a) Adding the test cases in the same PDE project as the actual code to test and execute that via Tycho with an explicit call to maven-surefire-plugin
b) Adding the test cases in another dedicated test project which is a simple Maven module (no Eclipse specific metadata necessary) with packaging jar which automatically executes those through their default binding
c) Just execute those tests inside Eclipse similar to the other ITs (although unnecessary overhead for those)

Which one would you guys prefer for a test for code in https://github.com/eclipse-m2e/m2e-core/tree/master/org.eclipse.m2e.launching?

[laeubi]

Tycho perfectly supports tests with JUnit running inside Eclipse.

Actually Tycho do not do anything inside Eclipse, do you mean running eclipse as part of the test? Or "Pugin Tests" (with or w/o UI)

I am wondering, though what is the best approach for plain JUnit test cases which don't require an OSGi runtime.

The usual way here would be to create a test-source-folder in the plugin and just use surefire.