Simply developing an application with interesting features is not enough, despite it having the potential for mass appeal. Before a market launch it is necessary to perform a complete functionality test and verify whether the application is capable of working on various platforms to ensure its competitiveness.
The purpose of functional testing
The reasoning for this type of testing is to verify each function of the software application and to evaluate its alignment with the defined specifications. The test involves a check of the user interface (UI), API, database, security and of the functionality on various software and hardware platforms.
Types of functional testing
During functional testing developers carry out unit tests to test parts of the code in the development environment and further integration testing to find out how the individual features of an application work together. Next up is system and regression testing conducted by testers. Their aim is to test the system as a whole and to find out whether debugging hasn't created new bugs.