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What Is TestNG? Automation Testing Framework Explained

Automate tests with TestNG and Selenium in Java. Cover annotations, test grouping, parallel execution, parameterization, and CI/CD integration for QA engineers.

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TestNG is a Java testing framework that provides annotations, test grouping, parallel execution, parameterization, and detailed reporting capabilities for organizing and executing automated test suites. Annotations like @Test, @BeforeMethod, @AfterMethod, @BeforeClass, and @AfterClass control test execution flow, configure test setup and teardown, and define dependencies between test cases. TestNG manages test organization and execution while Selenium handles browser automation. Together they form a widely used framework for automated web application testing with structured reporting. Parallel execution allows multiple tests to run simultaneously across different threads, browsers, or environments, significantly reducing total test execution time for large automation suites. TestNG offers more advanced features than JUnit, including flexible test configuration, dependency management between tests, built-in parameterization, parallel execution, and richer test reporting out of the box.
INSIGHTS & FRAMEWORKS

Proprietary research. Actionable frameworks.