Functional Testing is a valuable tool for ensuring that a system or component behaves as intended and meets the specified requirements. However, it is vital to consider the advantages and disadvantages of functional Testing carefully and to combine it with the conjunction of other types of Testing as appropriate to ensure that the system or component is thoroughly tested and meets the needs of the end-user or customer.
Functional Testing and non-functional Testing are two different types of Testing that are used to evaluate the behaviour and functionality of a system. Here are the main differences between functional Testing and non-functional Testing:
- Scope: Functional Testing focuses on the behaviour and functionality of a specific component or unit, while non-functional Testing evaluates the performance, reliability, and other characteristics of the system as a whole.
- Level of Testing: Functional Testing is typically performed at a lower level of Testing, closer to the source code, while non-functional Testing is performed at a higher level, closer to the user interface.
- Purpose: The main purpose of functional Testing is to ensure that the system or component behaves as intended and meets the specified requirements. The main purpose of non-functional Testing is to evaluate the performance, reliability, security, and other characteristics of the system that are not related to specific functional requirements.
- Techniques: Different techniques are used in functional Testing and non-functional Testing. Functional testing techniques, such as black box testing and white box testing, focus on the input and output of the system or component. Non-functional testing techniques, such as performance testing, security testing, and usability testing, focus on the overall behaviour and characteristics of the system.
In summary, functional Testing focuses on the behaviour and functionality of a specific component or unit, while non-functional Testing evaluates the performance, reliability, and other characteristics of the system as a whole. Functional Testing is performed at a lower level, closer to the source code, and is concerned with verifying that the system or component meets the specified requirements. Non-functional Testing is performed at a higher level, closer to the user interface, and is concerned with evaluating the overall performance, reliability, and other characteristics of the system.
