test(fonts-massive-scaling): verify Massive Data Sets and Extreme High Bounds Scaling

[Thacker-Meet]

Description

Fixes #4400

Adds a dedicated massive-scaling test suite for lib/svg/fonts.ts focused on high-volume execution scenarios and extreme input bounds.

The test suite validates:

• Resolution of thousands of predefined font lookups under heavy load.
• Processing of thousands of unique custom font names.
• Large-scale predefined font key validation operations.
• Mixed valid and invalid font input handling at scale.
• Consistent behavior during repeated high-volume execution cycles.

The tests are based on the actual responsibilities of the font utility module and verify stability, correctness, and performance characteristics without introducing implementation-specific assumptions.

Pillar

• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

• N/A (test-only changes)

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally (localhost:3000/api/streak?user=YOUR_USERNAME).
• I have run npm run format and npm run lint locally and resolved all errors (CI will fail otherwise).
• My commits follow the Conventional Commits format (e.g., feat(themes): ..., fix(calculate): ...).
• I have started 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 (no raw elements, smooth animations, correct fonts).
• (Recommended) I joined the CommitPulse Discord community for contributor discussions, mentorship, and faster PR support.

[github-actions]

📦 Next.js Bundle Size Report (Gzipped Sizes)

✨ No significant bundle size changes detected.

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	3433.75 KB	3433.75 KB	0 B
Total CSS	258.05 KB	258.05 KB	0 B

[Aamod-Dev]

Thanks for the font utility scaling tests. I reviewed the PR title/description, linked issue #4400, checks, and the actual diff before labeling.

Labels applied:

• level:intermediate: the new lib/svg/fonts.massive-scaling.test.ts file is a compact 77-line suite, but it still exercises multiple high-volume branches: 10,000 repeated resolves, 5,000 custom names, 15,000 validation checks, and 100 repeated cycles.
• quality:clean: the tests are deterministic, use direct assertions on the utility outputs, and avoid unnecessary DOM or snapshot noise.
• type:testing: the PR is pure test coverage for fonts.ts, matching the issue's request.
• type:performance: two cases explicitly time the repeated resolve/validation loops with performance.now() and enforce sub-second bounds.

All required checks are green and the PR is not draft or blocked, so I’m approving and adding gssoc:approved.

[github-actions]

🎉 Congratulations @Thacker-Meet! Your PR has been successfully merged. 🚀

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