There are many other differences between those two frameworks. For brevity, we do not cover all of them in this book. Consult their documentation for further information.

TestNG provides more features and is more advanced than JUnit. We'll work with TestNG throughout this chapter, and you'll get to know it better. One thing that you'll notice is that we won't use any of those advanced features. The reason is that, with TDD, we rarely need them when working with unit tests. Functional and integration tests are of a different kind and would serve as a better demonstration of TestNG's superiority. However, there are tools that are more suited for those types of tests, as you'll see in the following chapters.

Which one should you use? I'll leave that choice up to you. By the time you finish this chapter, you'll have hands-on knowledge of both JUnit and TestNG.