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Non-functional testing is just as critical as functional testing. When testing software, testers are required to perform both functional and non-functional testing with equal weightage. To understand non-functional testing more clearly, let’s first examine how it differs from functional testing.

Testing the software at different levels helps us deliver quality software. White Box Testing is the stage where we check if the software meets our requirements.

Every website or software has various systems, such as APIs and web services. These systems need to communicate flawlessly for the software or website to be functional. An interface is a point of communication between two systems.

Some time ago, university software engineering teachers showed the traditional test phases using the waterfall process: the sequential line of unit test (UT), functional verification test (FVT), system verification test (SVT), and global verification test (GVT) to check the user-readable text. More enthusiastic teachers also showed black box and white box testing for test cases with and without access to the source code, respectively.

In this article, we’ll be discussing what regression testing is, why it’s helpful, and how to do it. Regression testing tells us how unchanged or old features will be affected when adding a feature, deleting a feature, modifying a feature, and fixing defects. In regression testing, we re-execute the same test cases in different releases or builds or test cycles to make sure that changes like adding, deleting, modifying feature, and fixing defects is not affecting the other features.

In Agile/DevOps, as new products emerge, new companies appear, and new features are delivered faster. Regular testing is essential, but it requires several steps, consuming much time needed for Exploratory Testing or Monkey Testing.