Fulfillment of all Requirements for and Application

Functional testing is a test to prove that software works as it should. It is an essential step in software development as it validates the software against functional requirements. It verifies that every function of a software or application does what is specified in the Technical Requirements.
Functional testing checks existing links, database connections, forms, search engines codes and cookies. To do this, operations are performed using cases or workflows to compare the output with the expected result.