JUnit has been one of the most popular testing frameworks for a long time, with 85% of Java developers claiming to use it in JetBrains' 2021 survey. In addition, JUnit also plays a crucial role in the practice of TDD (test-driven development), a trending strategy for dev teams all over the world.
Developers use JUnit to implement unit testing which in turn helps them improve code quality and accelerate programming. JUnit’s popularity is no surprise, considering that it contributes so much to enhanced productivity in delivering quality code. That said, some teams are still using JUnit 4 and are worried about the disruption that migrating to JUnit 5 could cause.