What is functional and non-functional testing?

Functional Testing: Testing based on an analysis of functional aspects of software system such as technical details, data manipulation and processing and other specific functionalities. Functional testing describes how the system should work.

Type of functional testing
 

• Regression testing
• User-acceptance testing
• System testing
• Interface testing
• Unit testing
• Integration testing

Non-functional Testing: Non-functional testing is the type of testing required to measure non-functional aspects of the software system such as reliability, usability, maintainability, security. Non-functional testing describes what the system should do.

Type of non-functional testing

• Installation testing
• Reliability testing
• Security testing
• Performance testing
• Documentation testing