- EnumTests: 9个snake_case枚举约定验证 + LogLevel大写验证 - ConstantsTests: 20个TableName精确值 + 3个SensitiveConfigKey + 6个ErrorCode数字校验 - EntityTests: 20个实体属性赋值读回测试 - PagedQueryTests: 边界值测试(page=0/-1/pageSize=0/101自动修正) - PagedResultTests: TotalPages计算(空数据/满页/跨页/除零保护) - ApiResponseTests: Success/Fail工厂方法+null数据+复杂对象 - DtoTests: LoginRequest/MachineQuery/CreateMachineRequest/MachineListItem赋值测试