Complete JUnit 4 and JUnit 5 course for beginners

This course is divided in 3 major sections:

Section I:

1. The fundamental concepts and theory related to unit testing in general, regardless of programming language;

Section II:

1. The fundamental techniques and features of JUnit 4 (a pre-requisite for part II of the course);

Section III:

1. The architecture and extension model  introduced in JUnit 5;

2. The advanced techniques and features introduced in JUnit 5.

If you are a totally new to unit testing in general and unit testing in Java in particular then I highly recommend that you take the three sections in the order presented above.

If you're familiar with JUnit 4 then you may skip Section II. I'd still recommend that you take Section I though since it introduces fundamental concepts that you may not be familiar with pertaining with unit testing in general even if you've some experience in JUnit 4.