JUnit silently fails to resolve tests if they aren't of type `void`. This can be confusing, particularly in other JVM languages like Scala.

[GavinRay97]

Steps to reproduce

1. Make class with a JUnit @Test that doesn't return void
2. Try to run all tests
3. Have it be reported that no tests were found

Context

Following a multi-day investigation and discussion with the Redhat/Quarkus team at:

• No tests were found when trying to run JUnit tests with Scala 2 or WIP Scala 3 extension quarkusio/quarkus#18373
• https://quarkusio.zulipchat.com/#narrow/stream/187038-dev/topic/.22No.20Tests.20Found.22.2C.20last.20issue.20for.20Scala.203.20support

The confusion

The resolution

• (Add : Unit to function signature to have it generate void as return type in bytecode)

Deliverables

Please would it be possible to either:

• Make JUnit tests accept @Test that return things beside void, potentially just disregarding the return type
• Issue a VERY LARGE, blatant error/warning message when No tests were found that JUnit only resolves @Test methods of type void. Something like No tests returning type "void" were found. JUnit only resolves tests of type "void".

[marcphilipp]

Thanks for raising the issue! This has come up before and is tracked in #242. Feel free to join the discussion there!

[GavinRay97]

Thanks for raising the issue! This has come up before and is tracked in #242. Feel free to join the discussion there!

Sorry, wasn't aware of the existing issue -- my apologies!

[marcphilipp]

Sorry, wasn't aware of the existing issue -- my apologies!

No worries at all!