[Backend] Add Comprehensive Test Coverage for Core Learning Services

[ayomideadeniran]

🚀 Feature Overview

Add unit and integration tests for curriculum and progress services with coverage reporting and CI integration.

This is an essential, MVP-critical feature designed to ensure learning functionality works correctly.

🛠️ 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.
• Include both unit and integration tests.
• Follow security best practices.

✅ Acceptance Criteria

• Test coverage meets requirements.
• All tests pass consistently.
• CI integration works correctly.
• Documentation is complete and educational.

🎓 Difficulty Level

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

⏱️ Timeline

ETA: 2 days

[Abdulrasaq1515]

@Abdulrasaq1515 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I want to work on this because curriculum and progress services are core to learning functionality — without comprehensive tests, regressions in enrollment, lesson tracking, and progress calculation break the user experience. Adding unit tests (for business logic) and integration tests (for database interactions) with >90% coverage ensures reliability.

Relevant experience:

NestJS testing — wrote 200+ unit/integration tests for learning platform: curriculum service (course enrollment), progress service (lesson completion tracking), coverage reporting with Jest

CI integration — configured GitHub Actions to run tests on PR, fail if coverage <90%, generate coverage reports

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Abdulrasaq1515 to this issue.

[Malcolm-Wander]

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

Hey maintainer,I’d love to work on this issue,thank you

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