Test levels are groups of test activities organized and managed together concerning software at a given level of development, from individual units or components to complete systems.
Component Testing
Component testing, also known as a unit or module testing focuses on components that are separately testable.
Integration Testing
Integration testing focuses on interactions between components or systems.
System testing
System testing focuses on the behaviour and capabilities of a whole system or product, often considering the end-to-end tasks the system can perform and the non-functional behaviours it exhibits while performing those tasks.
Acceptance Testing
Typically focuses on the behaviour and capabilities of a whole system or product. Common forms of acceptance testing include the following:
User acceptance testing
Operational acceptance testing
Contractual and regulatory acceptance testing
Alpha and beta testing
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