White-box testing of module sawdust.alpha is skipped at the moment.

And...
The TestCompilerMojo throws an exception when only the test sources contains a module descriptor.

Initial Eclipse support was added via b693312

You may import 3 projects (1 root, 2 nested) into your workspace:

Running JUnit 5 tests is not supported, yet.

I've tried the newest version of IntelliJ EAP (2020.1) and still, IntelliJ complains about the two module-info.java via:

'module-info.java' already exists in the module

Maven compiles just fine though. And I was not able to find any other problems besides these red underlines that indicate errors in IntelliJ.
Any ideas about that?

Sorry, I know this is more a question than an issue, but I got confused by some objections I had to face on testing in a modular context that I want to be cleared :)

Let's suppose we have the following project structure:

src/
  main/
    java/
      my.library/
        internals/
          Internal.java
        Util.java
      module-info.java

with the following module-info:

module my.library {
  exports my.library;
}

In order to make tests on Internal.java as well, I have to define another module-info with the following project structure for test folder only, and fix the original module-info:

src/
  main/
    java/
      my.library.test/               <<<<< pay attention
        internals/
          InternalTest.java
        UtilTest.java
      module-info.java

with the following module-info:

open module my.library.test {
  requires my.library;

  requires // junit, assert4j, ...
}

with the fix for the original module-info:

module my.library {
  exports my.library;
  exports my.library.internals to my.library.test;
}

Do you know if there is any evident issue with this approach? Unfortunately, this is the only way I found to make IntelliJ happy.

Thank you in advance for any reply!

https://github.com/junit-team/junit5-samples/tree/master/junit5-modular-world contains a minimal setup with black-box and white-box testing samples.

ETA: end of April (https://github.com/junit-team/junit5/milestone/26)