What Is Regression Testing?

Many people mistakenly believe that if they’ve tested their product once, then they never have to test it again. However, your product will change and develop over time, as will the applications it runs on. As a result, your product will need to be retested constantly to ensure that it can work with these changes. That’s where regression testing comes in.

What is it?

Regression testing is a type of automated testing that quality assurance testers use to make sure that a product still functions after code changes or updates. In other words, if you make any changes to your product or software, it will check to see if those changes have created any new bugs or glitches in your product.

When to institute regression testing

When, exactly, is regression testing needed? The simple answer is whenever you have made any changes, no matter how small, to your product. More specifically, you should run through a test in any of the following scenarios:

• New requirements are added
• New features are added
• A previous defect or bug is fixed
• Changes in the configuration
• Performance issues are fixed

Why is it so important?

If you haven’t guessed it already, regression testing is important because it makes sure that your product continues to function as it should. Even the smallest change can cause a domino effect to occur inside of your software, resulting in bugs and glitches that you didn’t even think possible. Regression testing can detect these problems early, allowing your team to find a fix before the update is released.

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