Regression Testing Guide – Tools, Types and Techniques

What is Regression Testing?

According to Wikipedia, Regression testing is an important type of software testing that revolves around re-running functional and non-functional tests. These tests are conducted to ensure and check the previously developed and tested software still perform well even after a change is made in the software. 

Primarily, it checks whether the previous functionality of an application is working as intended even with a new feature added. It checks for any new bug or error in the existing software and is a verification process that takes place in the software.

Whenever the new software is released, there is an essential need to test the new functionality. There is a necessity to re-run the old tests to ensure that new software does not re-introduce any old defects or create new ones that might affect the existing functionality. 

Though software regression testing seems to be a simple concept, it is quite challenging as it tests the functionality of the added features. This verification process effectively holds immense importance, especially when there are continuous changes or improvements that are made in the application.

Software regression testing should be performed and taken up as soon as the programmer adds new functionality to an application. This is because of the dependency between the newly added and previous functionality that is critical for the software to function according to the requirements defined.

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