What is Regression Testing?

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What is Regression Testing?


Regression Testing is retesting sub-systems/modules/units to insure that modifications to one sub-system/module/unit does not cause unexpected results in another area. This is also known as ripple effect testing. It is said there is up to 50% chance that changing code can have a serious negative effect on another area.

The benefits of Regression Testing are:

  • Find newly developed faults in unrelated area of code caused by modification.
  • The earlier faults detected the cheaper it is to fix.
  •  Installs discipline within the Test Engineers to be thorough


Comments

  1. Scally18 November 2012 at 12:57

    I'm still a little confused. What is the difference between regression testing and re-testing?

    ReplyDelete
    Replies
    1. Admin18 November 2012 at 13:03

      Retesting is exactly that. A general reiteration of the testing procedure. Whereas regression testing looks at defects in other areas caused by recent code modification, patch or update.

      Delete
    2. Scally27 May 2013 at 11:51

      Thanks it came up in my istqb exam and nailed it!

      Delete

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