During December 2024, Bosco Chen developed unit testing mock support for UEFI protocols in the microsoft/mu_basecore repository. He implemented mock versions of PciRootBridgeIoProtocol and PciPlatformProtocol, along with mock functions for RaiseTpl and RestoreTpl within the MockUefiBootServiceTableLib. Using C and C++, he focused on improving the testability and reliability of UEFI-related components by enabling more robust automated testing of protocol interactions. His work centralized mock implementations, which enhanced maintainability and provided clearer CI feedback. This targeted feature addressed issue #1213, demonstrating depth in mocking frameworks, protocol implementation, and unit testing for firmware development environments.