Functional testing is defined as a type of testing that verifies that each function of the software application operates in conformance with the requirement specification.

Each and every functionality of the system is tested by providing appropriate input, verifying the output and comparing the actual results with the expected results.

This testing involves checking of User Interface, APIs, Database, security, client/ server applications and functionality of the Application Under Test. The testing can be done either manually or using automation

The prime objective of functional testing is checking the functionalities of the software system. It mainly concentrates on –

  • Testing the main functions of an application
  • It involves basic usability testing of the system. It checks whether a user can freely navigate through the screens without any difficulties.
  • Checks the accessibility of the system for the user
  • Usage of testing techniques to check for error conditions.  It checks whether suitable error messages are displayed