Dear experts, I'm from JUG UA and currently playing with new Java 9 Module System using Early Access Jigsaw build #174. As an exercise I'm modularising JUnit 5. In process I faced couple of issues and have couple of questions to you:
1. *How to compile test classes that are packaged in same packages as production code? *When I'm trying to compile test sources separately from application sources that have been already modularised (packaged in modules) I'm getting errors saying that particular packages already found in certain modules on module path. What are recommendations (best practice) here? 2. When I'm trying to run unit tests placed on classpath using modularised JUnit5 library put on module path I'm getting errors like "*Could not load class with name: org.junit.platform.commons.util.CollectionUtilsTests*". I have deduced that it is because CollectionUtilsTests class lives in same package as already exists in junit.platform.commons module placed on module path. If I run org.junit.mytests.SimpleTest from custom unique package instead everything works fine. My question is more general here though: *how to deal (access via reflection for example) with classes on classpath that use same packages as certain modules on module path?* We can't (it will be very difficult and inconvenient) ensure that no library on classpath uses same package as some of the modules on module path... Could you please clarify these aspects to me please or point me where I can read about it? Thank you, Oleg
