The idea isn't to supplant JUnit or any other existing unit testing framework, but to understand how a testing framework could be created from scratch through test-driven development (TDD) without recourse to any existing testing framework.
For this project, we acknowledge the existence of frameworks like TestNG, and we do use ideas from those frameworks, but we won't be using those frameworks directly (except maybe as a formality in NetBeans to get the proper separation between Source Packages and Test Packages started).
For instructions on how to use this testing framework, see How to Use This Framework. For instructions on how to contribute to this project, see CONTRIBUTING.md.
Note that although we've upgraded to Java 21, the releases 0.9 and 1.0 will most likely be for Java 8.