JUnit is one of the most popular Java-based open-source frameworks used for testing every unit of the application, i.e., classes and methods. And for automating the testing of web applications, you can use it with the Selenium WebDriver. Though Selenium and JUnit can function independently, combining them can help develop tests in a structured format.
Though Java offers several IDEs using which you can write code and run tests, you would like to execute JUnit from the command line. Why?