Description: Library Testing is an approach within Test-Driven Development (TDD) that focuses on validating the functionality of libraries used in software development. These tests ensure that libraries, which are collections of functions and procedures that can be reused across different programs and applications, work correctly and meet established requirements. By conducting specific tests on these libraries, developers can identify errors and unexpected behaviors before integrating these tools into larger systems. This approach not only improves software quality but also facilitates collaboration among teams, as well-tested libraries can be shared and used by different developers without fear of introducing bugs. Library Testing is essential in environments where modularity and code reuse are priorities, allowing development teams to focus on creating more robust and efficient solutions.