Software testing is a multi-faceted process, and different levels of testing are performed to ensure the quality and reliability of a software application. These levels represent various stages in the software development life cycle where testing activities take place. The primary levels of testing include:
Unit Testing:
Definition: The smallest level of testing, focusing on individual units or components of the software.
Objective: Verify that each unit or module performs as designed in isolation. Developers typically perform unit testing during the coding phase.
Integration Testing:
Definition: Testing the combined units or components to ensure they work together as intended.
Objective: Identify issues related to the interface between integrated components, data flow, and the proper functioning of the system as a whole.
System Testing:
Definition: Testing the entire software system as a whole.
Objective: Ensure that the software system meets specified requirements and functions correctly in its intended environment. This level of testing assesses the system's overall compliance with functional and non-functional requirements.
Acceptance Testing:
Definition: Evaluating the system's compliance with business requirements and determining whether it satisfies user needs.
Objective: Confirm that the software is ready for release and meets user expectations. Acceptance testing can be conducted by end-users or a dedicated testing team.
Regression Testing:
Definition: Testing a software application to ensure that new changes (enhancements, bug fixes) do not negatively impact existing functionalities.
Objective: Prevent the introduction of new defects when modifications are made to the codebase. Regression testing is often automated to efficiently validate a large number of test cases.
Read More... Software Testing Course in Pune