Alex Sanderson developed a comprehensive test suite for the AuthorizationQueryDto component in the operaton/operaton repository, focusing on validating filter and sort parameter handling for both provided and missing values. Using Java, JUnit, and Mockito, Alex implemented AuthorizationQueryDtoTest to rigorously assess edge-case behaviors and ensure the robustness of the authorization query logic. This work enhanced regression safety and clarified expectations for future development by thoroughly covering the DTO’s input scenarios. The disciplined approach to unit testing improved maintainability and future-proofed the authorization module, reflecting a strong emphasis on backend development best practices within a short project timeframe.