Add testing to a Maven project

This post was not so obsolete as the previous two ones, however it referred to JUnit 4, while the most interesting point in the argument, I feel, is in the fact that we should use a recent Surefire Maven plugin if we want the test run on build work with JUnit 5.

So, again, so long my outdated post. If interested, you could get its new version on my other blog: https://thisthread.blogspot.com/2020/05/test-on-build-with-maven.html.