What is functionality testing?
Simply put, a functionality test focuses on the functions of your product. It ensures that an application works as advertised, checking that each feature performs properly. A functional test, then, is all about what a product does. It validates basic usability and accessibility so that the user receives a well-functioning product at the end of testing.
There are many types of functionality tests, including the following:
- Smoke testing
- Unit testing
- Black box testing
- Regression testing
- Sanity testing
- Integration testing
- White box testing
- Accessibility testing
Functional testing vs. Non-functional testing
Most quality assurance tests can be lumped into one of two categories: functional tests and non-functional tests. A functional test is all about the actual function—or, making sure that a feature actually works. A non-functional test, meanwhile, is about how those functions perform. This includes such things as reliability, speed, efficiency, and more.
While a functional test focuses on what a feature does, a non-functional test focuses on how that feature does it.
