Component testing is a subset of software testing that involves validating every component of software applications independently without merging them. In the context of architecture, it often relates to module testing. A software application usually consists of several parts or components, and component testing addresses each of these components independently. Component testing is one of the most common forms of black-box testing performed by the testing team.
Each component of the software or application will be tested individually in accordance with a test strategy and test plan. For each of these components, a test scenario is defined, which is further subdivided into high-level test cases to low-level detailed test cases.