Congratulations! You completed the lesson on JUnit testing! 🙌

Key concepts covered in this lesson:

• JUnit testing makes sure we have good test coverage across a program’s code and verifies everything is working as expected.
• How to write @Test methods and their incorporations of the Assert class library.
• How to write @Before methods and why they’re useful.
• How to write @After methods and why they’re useful.
• What test suites are and what they’re used for.
• “Red — Green — Refactor!”