Functional testing is black-box testing which is used to test the functionality of the system by providing certain valid inputs to generate the desired output. Functional testing not only determines the functionality of the system as per requirement but also determines whether the software is ready to release at the end-user environment or not.
There are two ways to do functional testing, and those are :
Functional testing manually : manual testing involves a human performing all the processes of testing step by step.
Functional testing through the automatic process is done without any human assistance, and the automated process is often done with tools and software.
There is a similarity in both of the functional testing processes. Both processes include testing the application using inputs and verifying and determining the output or result after comparing the work with expected results. Functional testing has various phases that are done while testing an input. Functional testing is done to ensure that the current functionalities of the application or software are ready to use.
