TestNG Framework with Java – A Complete Guide for QA Automation Engineers
TestNG (Test Next Generation) is one of the most widely used testing frameworks in Java, especially in automation testing. It provides powerful features such as test grouping, assertions, data-driven testing, parallel execution, dependency injection, reporting, and integration with Selenium and Appium. 1. Introduction to TestNG TestNG is a testing framework inspired by JUnit and NUnit but designed with additional features that make it ideal for large-scale automation: ✔ Flexible test configuration ✔ Parallel execution ✔ In-built reporting ✔ Groups and prioritization ✔ Data-driven testing It is heavily used with Selenium WebDriver and Appium . 2. Why TestNG? Key Features Feature Description Annotations Clear structure ( @Test , @BeforeSuite , etc.) Parallel Testing Run tests faster using multi-threading Data Providers Enables data-driven testing Test Grouping Smoke, regression, sanity, etc. Dependency Tests Control test execution flow Reporting Generates HTML reports automa...