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Nonfunctional testing is important. But what's the difference between functional and nonfunctional testing? Find out in this blog.
Nonfunctional testing verifies how applications work by examining things like performance, accessibility, and UX.
The difference between functional and nonfunctional testing is what they test.
Functional testing ensures that functions and features of the application work properly. Nonfunctional testing examines other aspects of how well the application works.
Functional testing tests the functionality of an app. Nonfunctional testing tests the performance of these functions.
Some examples of functional testing include unit testing, integration testing, API testing, exploratory testing, and critical business flows testing, These all test functional aspects of the website or mobile app.
Examples of nonfunctional testing types are listed down below.
Nonfunctional testing is just as critical as functional testing. And because teams need to conduct a mix of different types of testing, you need to be doing both.
Nonfunctional testing makes applications more usable and more reliable. Unfortunately, it can often be rushed in an effort to meet release deadlines.
When nonfunctional testing is overlooked, performance and UX defects can leave users with a bad experience and cause brand damage. Worse, applications could crash with an influx of users. Accessibility defects can result in compliance fines. And their security could be at risk.
Nonfunctional testing is an umbrella term. There are many nonfunctional testing types. Here are a few.
The traditional approach towards non-functional testing means it occurs at the end of the software delivery process, sometimes even extending beyond. Too often, nonfunctional testing is either left to the end of the cycle or done only partially. Or, it’s outsourced externally, where it is performed manually due to a lack of time and automation abilities.
In these cases, critical tests don’t run in time to fully guarantee the delivery readiness of upcoming releases. This risks brand damage, compliance issues, and worse.
What can be done to fix this?
Modern testing frameworks and cloud-based solutions allow earlier testing in the SDLC. These allow for identification and resolution of nonfunctional testing defects. Without nonfunctional testing early in the cycle, these defects have the potential to delay release. Nonfunctional testing thus reduces costs, unnecessary effort, and risk.
Early testing also smooths the transition from development to functional and nonfunctional testing.
Technology is only one half of the equation though. A cultural commitment to Agile principles is also needed. Teams need to constantly monitor and fine tune their tests so that they are aligned, well-perceived, and trusted.
Nonfunctional testing is a critical part of any testing strategy. But it has to be able to scale to your testing needs.
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DevOps Chief Evangelist & Sr. Director at Perforce Software, Perfecto
Eran Kinsbruner is a person overflowing with ideas and inspiration, beyond that, he makes them happen. He is a best-selling author, continuous-testing and DevOps thought-leader, patent-holding inventor (test exclusion automated mechanisms for mobile J2ME testing), international speaker, and blogger.
With a background of over 20 years of experience in development and testing, Eran empowers clients to create products that their customers love, igniting real results for their companies.