TestGen generating performance comparative tests (#93)

[alexgarzao]

This PR introduces significant improvements and new features to the test generation system, focusing on better support for comparative benchmarking, function code unit tests, and more maintainable test configuration. The changes include new test generators, template files, and a refactored exclusion mechanism for test cases, as well as updates to validation tag mappings for better compatibility with go-playground/validator. The Makefile is also updated to handle the new test files and clean-up logic.

New test generation features:

• Added generators for comparative performance tests (testgen/generate_cmp_perf_tests.go) and function code unit tests (testgen/generate_function_code_tests.go), along with their corresponding templates (testgen/cmp_perf_no_pointer_tests.tpl, testgen/cmp_perf_pointer_tests.tpl, testgen/function_code_test.tpl). These enable automated benchmarking and more thorough unit testing of generated validation code. [1] [2] [3] [4] [5]

Test case configuration and exclusion improvements:

• Refactored test case exclusion logic by introducing the excludeIf bitmask in testgen/validations.go, replacing the previous generateFor string approach. This makes it easier to manage which tests are generated for pointer/non-pointer types and benchmarking. All relevant test generators now use this mechanism. [1] [2] [3] [4]

Validation tag mapping updates:

• Updated validatorTag fields in typesValidation to ensure correct mapping to go-playground/validator tags for all supported validation operations (e.g., email, required, eq, ne, gt, gte, lt, lte, min, max, eq_ignore_case). This improves compatibility and accuracy of generated comparative tests. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

Makefile and test generation workflow updates:

• Enhanced the Makefile to support new test files and clean-up logic for generated benchmarks and function code tests, ensuring the build system stays clean and up-to-date with the new generators. The main test generation entrypoint (testgen/generate_tests.go) is updated to invoke all new generators. [1] [2] [3]

These changes collectively improve the robustness, maintainability, and extensibility of the test generation framework, while enabling more thorough validation and benchmarking of generated code.

[Copilot]

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