What Is Functional Testing?

Functional testing involves validating that a software application performs its intended functions. It includes activities such as requirement analysis, test case design, test execution, and result analysis to ensure that the software functions correctly in various scenarios during software testing.

Functional testing evaluates the system’s specific functions, while nonfunctional testing assesses aspects like performance, reliability, and usability. Functional testing ensures the software meets specified requirements, while nonfunctional testing addresses broader system attributes.

Functional testing focuses on verifying that a software application’s functions work as intended, and it can be performed manually or through automation. Manual testing involves human testers executing test cases without the use of automation tools.

Functional testing in Agile involves validating that software functionalities meet specified requirements. It is an iterative process conducted throughout development to ensure continuous alignment with changing project requirements in an Agile environment.

API testing can include both functional and nonfunctional aspects. Functional API testing verifies that the API performs its intended functions, while nonfunctional testing assesses aspects like performance, security, and reliability.