Better unit test framework

[LukeLemes]

Hi,

As this is for learning purpose and we never get the insight how the 42 test the code.

Would you thing about to use some unit test framework lib for c and for shell?
Would be much easier to do PR when there will be unified test procedure.

We can use bach, bashunits

[terminal-42s]

Reply: Unit Testing Framework Integration

Great suggestion! I think this is definitely worth considering. Here's my perspective:
✅ Why This Would Be Beneficial

Unified Test Procedure: Having standardized test frameworks (like bash or bashunits for shell scripts, and Check or CUnit for C) would make it much easier to validate exam exercises consistently across different ranks.

Better PR Review Process: Contributors could submit solutions with automated test suites, and maintainers could immediately verify correctness without manually running each exercise. This significantly reduces friction in the review process.

Learning Value: Since this is for learning purposes, showing students how to test their code is educational. They'd see best practices right in the repo.

Regression Prevention: As the project grows and we add Rank 04/05 exercises, automated tests prevent accidentally breaking existing content during updates.

🤔 Practical Considerations

Lightweight Approach: Given the project's educational focus, we might prefer:
    bashunits or bash for shell scripts (minimal dependencies, easy to integrate)
    Criterion or Check for C (more feature-rich if needed, but heavier)

Incremental Integration: We could start by:
    Adding test frameworks for new exercises
    Gradually retrofitting existing exercises
    Documenting test patterns in the README

CI/CD Potential: A test framework opens the door to GitHub Actions workflows that auto-validate PRs before merge.