During December 2024, Tianhao Shuang enhanced the test infrastructure for SafeIntLib by developing robust mocking solutions across the acidanthera/audk and microsoft/mu_basecore repositories. He introduced Google Mock-based testing support in audk, integrating new mock headers and sources into the build system using C++ and INF configuration. In mu_basecore, he implemented a dedicated SafeIntLib mock and updated the DSC to streamline test integration. These efforts improved the reliability and maintainability of integer arithmetic code by enabling safer refactoring and earlier regression detection. His work demonstrated depth in build system configuration, embedded systems development, and advanced unit testing practices.