All Your Tests Belong to You: Maintaining Mixed JUnit 4/JUnit 5 and Testng/JUnit 5 Test Suites

If you are seasoned Java developer who practices test-driven development (hopefully, everyone does it), it is very likely JUnit 4 has been your one-stop-shop testing toolbox. Personally, I truly loved it and still love: simple, minimal, non-intrusive and intuitive. Along with terrific libraries like Assertj and Hamcrest it makes writing test cases a pleasure. But ...