Software Testing Levels

SOFTWARE TESTING LEVELS are the different stages of the software development lifecycle where testing is conducted. There are four levels of software testing: Unit >> Integration >> System >> Acceptance. Levels Level Summary Unit Testing A level of the software testing process where individual units of a software are tested. The purpose is to validate […]

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Unit Testing

UNIT TESTING is a level of software testing where individual units/ components of a software are tested. The purpose is to validate that each unit of the software performs as designed. A unit is the smallest testable part of any software. It usually has one or a few inputs and usually a single output. In […]

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Integration Testing

INTEGRATION TESTING is a level of software testing where individual units are combined and tested as a group. The purpose of this level of testing is to expose faults in the interaction between integrated units. Test drivers and test stubs are used to assist in Integration Testing. Definition by ISTQB integration testing: Testing performed to expose […]

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System Testing

SYSTEM TESTING is a level of software testing where a complete and integrated software is tested. The purpose of this test is to evaluate the system’s compliance with the specified requirements. Definition by ISTQB system testing: The process of testing an integrated system to verify that it meets specified requirements. Analogy During the process of manufacturing […]

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Acceptance Testing

ACCEPTANCE TESTING is a level of software testing where a system is tested for acceptability. The purpose of this test is to evaluate the system’s compliance with the business requirements and assess whether it is acceptable for delivery. Definition by ISTQB acceptance testing: Formal testing with respect to user needs, requirements, and business processes conducted to determine […]

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