Definition — What is Regression Testing?

Regression Testing is a type of testing in the software development cycle. It's a system-wide test that’s intended to ensure that a small change in one part of the system does not break existing functionality elsewhere in the system. It’s important because, without regression testing, it’s quite possible to introduce intended fixes into a system that create more problems than they solve. Regression testing can eliminate much of the risk associated with software updates. Regression testing is essential for large software applications, as it is often difficult to know whether changing part of an issue has created a new issue for a different part of the application. Think of a routine car maintenance scenario: you installed a new accelerator pedal only to find out that while the throttle fires perfectly, the clutch no longer works. Similarly, during cycles of software and requirements revision, new tweaks could impact smooth operations. You have to recheck the functionalities to see how well they behave.

Different Types of Regression Testing:

Regression testing is a huge process, which is taken seriously among all testers. There are various types of regression testing, that are used based on the requirements. It is widely suggested for testers to know and understand the difference among them because it helps them to pick the right type in a quick time.

• Corrective regression testing
  

• Retest-all regression testing

• Selective regression testing

• Progressive regression testing

• Complete regression testing

• Partial regression testing

• Unit regression testing
  

 An effective regression strategy, save organizations both time and money.