Regression testing is a sort of software testing used to ensure that a recent programme or code modification hasn't broken current features. Regression Testing is just a full or partial re-execution of previously executed test cases to confirm that current functionality are working properly.
This testing ensures that new code modifications do not have unintended consequences for current functionality. It ensures that the old code continues to function after the most recent code modifications have been made.
The need for regression testing emerges most often when there is a need to alter code and we need to see if the changed code impacts other parts of the software programme. Regression testing is also required when a new feature is added to a software application, as well as for bug and performance issues.
What is regression testing? When is it required