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Component testing involves the evaluation and validation of individual components or units of software or hardware to ensure they function correctly and meet specified requirements. This type of testing focuses on isolating and testing the smallest possible units of a system, such as functions, procedures, or modules, in order to identify any defects or issues early in the development process. Component testing is typically performed using tools and techniques such as unit testing frameworks, stubs, drivers, and mock objects to simulate the behavior of dependencies and test the component in isolation. The goal of component testing is to verify that each individual component performs as expected and integrates correctly with other components in the system.