Regression testing ensures changes to the source code are not causing unexpected issues to the existing system or to see if software functionality has regressed. Visual regression tests focus on how the user will receive the final interface that the user interacts with is essential and ultimately paramount to how web pages are displayed.
Malfunctions or flaws often lead to a sequence of chain reactions that can affect the software altogether as the program runs, impairing the overall user experience. Usually, the software undergoes many tests before Dev teams introduce modifications introduced in the main code. Regression testing is the final step of this process, which is an assurance of achieving a fully functional application or software. In this post, let’s explore seven different types of regression testing.
Regression testing—when done well—gives software teams the confidence that their entire application works properly after a code change. But doing regression testing manually is time-consuming, costly, and difficult to scale. As their applications grow in complexity, many teams end up having to throw more and more resources into regression testing—hiring more QA specialists and waiting longer for them to complete testing with each release cycle.
End-to-end testing is a type of software testing that checks the system as a whole from start to finish. Regression testing is software testing that checks for errors after changes have been made to the code. Both are important for the software development process. However, they are two different types of tests that serve different purposes.
Regression testing involves repeatedly evaluating an upgraded web app, software program, or system's existing functionalities as we went through Regression Testing Challenges and Best Practices in a previous post. Testers use it to verify an app's live and new features operate properly. Under regression testing, the quality analyst evaluates current features' functional and non-functional aspects for defects and mistakes.
In a world where technological advances are made on a daily basis, software products are often affected by routine updates. While updating software is necessary for all businesses, it can introduce a slew of bugs into applications and websites. If these software bugs are not thoroughly tested, validated, and fixed, they could end up costing the company a lot of money in production. User interface (UI) and visual bugs in software products are often disregarded due to the focus on functional testing.
Regression testing and unit testing are two different types of testing, yet many of TestQuality users use them interchangeably. Although we already went through Regression Testing Challenges and Best Practices in a previous post, it's important to distinguish between the similarities and differences between regression testing and unit testing. All unit tests are, in essence, regression tests.
The testing landscape has changed over time to include automated and functional testing as the baseline, but there are still ways to improve your testing because even with a fully automated continuous testing pipeline, there can still be the possibility of bugs existing in your passing tests. One of the ways to mitigate this is by adding visual testing to your testing pipeline.
Automated visual regression testing tools check for style issues and problems with the visual layer of an app or website. The benefit of these tools is that they can catch issues on the visual layer (the user interface of the website or app, which customers see) that may get missed by test scripts that only interact with the underlying code (the DOM).
For teams following agile software development practices, regression testing is a must. Agile teams constantly make changes to live software that can introduce regressions (or, code changes that break the functionality of part of an app). Regression testing can keep teams from shipping critical bugs to production by confirming the most important parts of an app are still working every time new code is pushed.
