Regression Testing

What is regression Testing

- Regression testing is the process of testing changes to computer programs to make sure that the older programming still works with the new changes.

- Regression testing is a normal part of the program development process. Test department coders develop code test scenarios and exercises that will test new units of code after they have been written.

- Before a new version of a software product is released, the old test cases are run against the new version to make sure that all the old capabilities still work. The reason they might not work because changing or adding new code to a program can easily introduce errors into code that is not intended to be changed

- The selective retesting of a software system that has been modified to ensure that any bugs have been fixed and that no other previously working functions have failed as a result of the reparations and that newly added features have not created problems with previous versions of the software. Also referred to as verification testing

- Regression testing is initiated after a programmer has attempted to fix a recognized problem or has added source code to a program that may have inadvertently introduced errors

- It is a quality control measure to ensure that the newly modified code still complies with its specified requirements and that unmodified code has not been affected by the maintenance activity