Introduction
In the dynamic landscape of software development, two fundamental testing practices, regression testing and retesting, play pivotal roles in maintaining software quality. This blog aims to elucidate the distinctions between regression testing and retesting and on their significance in the software testing lifecycle.
Regression Testing
Regression testing is the process of re-executing previously executed test cases to ensure that existing functionalities still work as expected after changes have been made to the software. These changes could be new feature additions, bug fixes, or enhancements. The primary goal of regression testing is to uncover any unintended side effects or regressions caused by the changes and ensure that the overall system functionality remains intact.
Retesting
Retesting, on the other hand, focuses on verifying that specific defects or issues identified in previous testing cycles have been addressed and resolved satisfactorily. It involves re-executing the test cases related to the fixed defects to confirm that the fixes are effective.
Difference between Regression and Retesting
| S.No | Regression Testing | Retesting |
| 1 | The purpose of this method is to verify that the new code modifications are not affecting the existing functionalities. | This method is executed to check the particular bug after it has been solved. |
| 2 | It is also called generic testing. | It is also called planned testing. |
| 3 | We use regression testing in the passed test issues. | We use retesting for the failed test issues. |
| 4 | Defect verification is not a function of regression testing. | Defect verification is not a function of retesting. |
| 5 | It can be performed both in manual or automation testing. | It can be performed in manual testing only. |
| 6 | Depending on the task and availability of resources, this method of testing can be taken out parallel with re-testing. | Retesting is mostly carried out before regression. |
Conclusion
Both regression testing and retesting play complementary roles in the software testing lifecycle, helping to identify and rectify defects, improve software quality, and enhance the overall user experience. By incorporating both practices into their testing processes, organizations can minimize the risk of software failures, increase customer satisfaction, and ultimately deliver higher-quality products to market.
References
https://www.leapwork.com/blog/difference-between-retesting-and-regression-testing
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