[Infrastructure] Set up Comprehensive Testing Suite (Vitest & Jest)

[Adithyakp86]

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📘 Additional Context (Optional)

Description
The project currently lacks any automated testing infrastructure. There are no unit, integration, or end-to-end tests for either the React frontend or the Node.js backend. This makes the codebase vulnerable to regressions and increases the manual effort required for PR reviews.

Impact

• Quality Assurance: No way to automatically verify that new changes don't break existing functionality.
• Contributor Confidence: New contributors have no way to test their changes locally before submitting a PR.
• Maintainability: Long-term maintenance becomes significantly harder as the codebase grows without a test safety net.

Proposed Solution

1. Frontend Testing: Install and configure Vitest and React Testing Library. Set up sample unit tests for core UI components (e.g., Navbar, Button).
2. Backend Testing: Install and configure Jest or Vitest for the backend. Implement integration tests for authentication routes (/register, /login).
3. CI Integration: Add a GitHub Action to automatically run tests on every Pull Request.

Evidence

• No test/ or __tests__ directories found in the project.
• No testing dependencies (jest, vitest, etc.) listed in package.json or backend/package.json.
• No test script defined in the scripts section of either package.json.

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🙌 Contributor Checklist (Optional)

• I have searched existing issues to avoid duplicates
• I agree to follow this project's Code of Conduct
• I am a GSSOC'25 contributor
• I want to work on this issue

[github-actions]

💡 Hi @Adithyakp86! Thanks for your continued contributions! We appreciate your efforts and suggestions. Keep up the great work! 🚀

[Adithyakp86]

assign this issue under OSCG