mapper▌

本 Skill 指导 AI Agent 使用 PROBE 五阶段协议，对任意本地 Git 仓库执行系统性探测，产出 .nexus-map/ 分层知识库。

Unit testing patterns for MapStruct mappers and custom converters with comprehensive transformation validation. \n \n Covers field mapping accuracy, null handling, type conversions, nested objects, bidirectional mapping, enum mapping, and partial updates \n Includes Maven and Gradle setup with MapStruct, JUnit 5, and AssertJ dependencies \n Provides patterns for testing simple mappings, nested hierarchies, custom @Mapping annotations, enum @ValueMapping , and @MappingTarget partial updates \n De