Spock Framework
Spock is a testing and specification framework for Java and Groovy applications, built on top of JUnit. It combines unit testing, mocking, and behavior-driven development (BDD) into a single, expressive language using Groovy. The framework provides a clean, readable syntax for writing tests, with features like data-driven testing, mocking, and stubbing built-in.
Developers should learn Spock when working on Java or Groovy projects that require robust, maintainable tests, especially in agile or BDD-focused environments. It is ideal for complex enterprise applications where clear test specifications improve collaboration between developers and stakeholders, and its integration with tools like Gradle and Maven makes it suitable for CI/CD pipelines.