JUnit Testing: Getting Started and Getting the Most Out of It` JUnit is widely used for unit testing in Java applications, being the most commonly included external library on Java projects on GitHub. However, many projects may not be getting the most out of it, as they lack knowledge on how to use JUnit effectively. To start using JUnit, one needs to install it and add a dependency to the project. After installation, writing tests involves creating a class, writing test methods, and running them from the console or through an IDE like Eclipse. To maximize testing performance and flexibility, users can consider parallel testing, which speeds up testing, and explore other tips such as using integration and acceptance tests with JUnit and tweaking the Eclipse environment to make tests run faster. Additionally, best practices for testing can be found in guides from Sauce Labs and articles by Chris Tozzi, providing valuable insights into test automation frameworks.