test(stats): add validation and cache behavior coverage

[pari-28]

Description

Fixes #4436

Added app/api/stats/route.validation.test.ts to provide isolated test coverage for the stats API route.

While the issue references theme-contrast behavior, app/api/stats/route.ts is a backend API route and does not render UI elements, styles, or color schemes. The implemented tests therefore focus on the actual runtime behavior exposed by the route.

Added Test Coverage

• Cache bypass behavior using bypassCache=true
• Cache status and refresh status header validation
• User-not-found handling for unresolved GitHub users
• Refresh rate-limit header verification
• GitHub API rate-limit error handling

Validation

• Added 5 test cases
• Verified locally using Vitest
• npm run typecheck passes successfully
• npm run lint reports warnings only (no errors)
• All new tests passing successfully

Pillar

• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

N/A (test-only change)

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally.
• I have run npm run format, npm run lint, and npm run typecheck locally.
• My commits follow the Conventional Commits format.
• I have updated README.md if required. (Not applicable)
• I have starred the repo.
• I have made sure that I have only one commit to merge in this PR.
• The SVG output matches the CommitPulse "premium quality" aesthetic standard. (Not applicable)
• (Recommended) I joined the CommitPulse Discord community.

[vercel]

@pari-28 is attempting to deploy a commit to the jhasourav07's projects Team on Vercel.

A member of the Team first needs to authorize it.

[Aamod-Dev]

Summary

The PR follows a known pattern of AI-generated superficial test files or inappropriate modifications that provide little to no meaningful runtime coverage and clutter the repository.

Required Changes

Issue 1

• Problem: The test file creates or simulates interactions on dummy structures, or simply adds redundant tests.
• Impact: It provides 0 real test coverage.
• Required Fix: Ensure the PR tests actual new runtime behavior and does not just add redundant tests.

[github-actions]

🚨 Hey @pari-28, the CI Pipeline is failing on this PR and it has been marked as status:blocked.

Please fix the issues before this can be reviewed. Here's how:

1. Run checks locally before pushing:

npm run format:check   # Check Prettier formatting
npm run lint           # Run ESLint
npm run typecheck      # TypeScript type check
npm run test           # Run unit tests (Vitest)
npm run build          # Verify production build passes

2. Auto-fix common issues:

npm run format         # Auto-fix formatting with Prettier
npm run lint -- --fix  # Auto-fix lint errors where possible

3. Check the full failure log here:
👉 View CI Run

Once you push a fix and the CI passes, the status:blocked label will be removed automatically. 💪

[Aamod-Dev]

Thanks for the contribution! I went through the changes and the testing approach looks very good. Testing cache behavior and rate-limit headers is an important part of backend stability.

I have applied the following labels for scoring:

• \level:intermediate: Testing the cache status, bypass behavior, and rate limiter interactions requires a good understanding of how the different backend parts interact, even if isolated to a single test file.
• \ ype:testing: The PR is primarily focused on adding test coverage.
• \quality:clean: The tests are readable, well-structured, and neatly organized.
• \mentor:Aamod007\

Thanks again for helping improve our test coverage!

[github-actions]

🎉 Congratulations @pari-28! Your PR has been successfully merged. 🚀

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