[Backend] Add Comprehensive Test Coverage for Certificate Services

[ayomideadeniran]

🚀 Feature Overview

Add tests for certificate generation, verification, and management with edge cases and security testing.

This is an essential, MVP-critical feature designed to ensure certificates are trustworthy.

🛠️ Implementation Requirements

• Build comprehensive test coverage.
• Include comprehensive unit tests with coverage >90%.
• Add thorough documentation and educational comments.
• Integrate with existing CI infrastructure.

🔧 Technical Specifications

• Built with Node.js and Express.
• Use Jest for testing.
• Cover edge cases and security scenarios.
• Follow security best practices.

✅ Acceptance Criteria

• Test coverage meets requirements.
• Edge cases are covered.
• All tests pass consistently.
• Documentation is complete and educational.

🎓 Difficulty Level

Intermediate - Requires understanding of testing and Node.js development.

⏱️ Timeline

ETA: 1 day

[cyberdocs120]

@cyberdocs120 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I’d like to work on this issue because it contributes to improving the project's functionality, reliability, and overall user experience. I enjoy working on open-source projects and collaborating with maintainers to deliver clean, maintainable solutions.

I have experience with software development across frontend, backend, testing, and debugging tasks. I’m comfortable working with existing codebases, following project guidelines, writing tests, and ensuring changes are well-documented. I can investigate the current implementation, propose a clear solution, and deliver a high-quality contribution that meets the acceptance criteria.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @cyberdocs120 to this issue.

[charliechinedu19-netizen]

@charliechinedu19-netizen has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

hey gm, i'd love to take on this issue real quick please

ℹ️ Repo Maintainers: To accept this application, review their application or assign @charliechinedu19-netizen to this issue.

[king-aj-the-first]

@king-aj-the-first has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hii, i'd like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @king-aj-the-first to this issue.

[drips-wave]

Congratulations, @king-aj-the-first! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @king-aj-the-first: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊