How is regression testing performed?

Any time a bug is fixed or a feature is added, an application’s behavior is uncertain i.e. there is the possibility of breakage and new defects.

But innovation, improvement, meeting customer's needs requires new code. So, what’s the answer to this ever-present process of code that presents danger?

Regression testing. Its purpose is to validate the existing code and quickly catch the unknown defects introduced by the new code so as to avoid a bigger problem.

For any product company regularly making changes to their code, regression testing is an important part of any QA services that must not be neglected or bypass.

How is regression testing performed?

Regression testing is done both manually and with a range of test automation tools. Automation can help you save a lot of time and increase the accuracy of your tests, so long as you choose the right test automation tool.

For regression testing to be effective, your QA team should outline the regression strategy, complete with entry and exit criteria. The team should also consider performance testing in the regression test plan — this will help validate that system performance is not impacted by changes made to other features.

For best results, regression testing should be built right into your test plan. If you’re using a hybrid, Agile-focused QA services vendor, your team will add regression testing into your effort estimate. If you’re on a 1–2 week sprint cycle, regression testing should be performed after the completion of feature testing. For monthly releases, regression testing is performed weekly and, in some cases, daily.

When to perform regression testing

Anytime a code change is done! This can be a defect fix, performance improvement, a new feature. Ideally, the QA team runs a regression test after the successful deployment and pass of a smoke test. Anytime an application’s code is changed, the application or code is in danger. Regression testing is a simple way to ensure the application or code functions properly.

How to select test cases for regression testing

Choosing the right test cases is the most important part of regression testing, as it ensures that you’re identifying and fixing the real problem areas. Look for test cases that:

  • Have had a high frequency of defects in past releases
  • Cover core feature or critical part of the application.
  • Cover features that impacts on generating revenue
  • Cover features that are accessible to the end-user
  • Cover all important areas of integration in the application

Regression Testing Best Practices:

In other for you and your team to perform good regression testing, there are some best practices to bear in mind.

  1. Have a regression test case with designated labels like priority level. This will help your QA to easily differentiate regression test cases and features test case
  2. Regularly Update Your Regression Test Case: It is a good idea to keep your regression test case up to date so as to avoid testing an older feature that has been removed.
  3. Focus more on the critical aspect of your application: They will include the basic functionality of your application and the most popular features. Your regression test case must include tests that ensure this core functionality is working as expected.
  4. Automate: Automated regression testing can make the process much more efficient. Manually running the same tests over and over again can become boring for a tester. The quality of their work might suffer as well.

To wrap up, regression testing is an efficient way to ensure that your code is functioning properly as you continue to build your application. If you’ve never launched a regression suite on your own, a qualified Netow Solutions Partner can help!

Netow Solutions is an independent quality assurance and software testing company in Nigeria.

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