TestNG
TestNG is a testing framework for Java designed to cover all categories of tests: unit, functional, end-to-end, integration, etc. It is inspired by JUnit and NUnit but introduces new functionalities like annotations, flexible test configuration, and parallel execution to make testing more powerful and easier to use. It supports data-driven testing, grouping, and dependency management, making it a popular choice for comprehensive test automation in Java projects.
Developers should learn TestNG when building Java applications that require robust and scalable automated testing, especially for complex scenarios like integration or end-to-end tests. It is ideal for projects needing features such as parallel test execution to speed up test suites, data-driven testing with parameters, or grouping tests to run specific subsets. Use cases include enterprise applications, web services testing with Selenium, and CI/CD pipelines where reliable and configurable test reporting is crucial.