What Is Regression Testing?

The two main activities of regression testing are re-running previously executed test cases to ensure that existing functionalities still work after code changes and adding new test cases to cover changes and enhancements. Regression testing aims to detect any unintended side effects of code modifications.

Regression testing is typically performed by software testers as part of the quality assurance process. It ensures that recent code changes do not negatively impact existing functionalities.

Regression testing involves re-executing test cases to ensure that recent code changes haven’t adversely affected existing functionalities. Automated regression testing tools can efficiently execute a suite of tests to verify software stability.

Regression testing tools include popular ones like Selenium, JUnit, TestNG, and NUnit. Commercial tools include Parasoft Jtest, C/C++test, dotTEST, SOAtest, and Selenic. These tools help ensure that changes in the codebase do not adversely affect existing functionalities.

Regression testing should be done whenever there are changes or updates to the software to ensure that new modifications haven’t introduced unintended side effects or broken existing functionalities.