Identified at https://github.com/rnveach/checkstyle-extras ,

I was expecting maven to bring in checkstyle's tests and it's respective sources so I could develop and debug issues that arise in checkstyle's core test code.

While tests is working, I noticed I could not view the source code of the tests, thus preventing proper debugging.

https://repo1.maven.org/maven2/com/puppycrawl/tools/checkstyle/10.3/
It seems there is no test sources in maven, while the test code itself is there. The only java files the test jar itself holds is the Input files, and none of the TestSupports or such.

I would the test sources to be published to properly debug the code and step through the source.