✨ [Feature request]: Add Comprehensive Unit Test Coverage for Common Utilities and Hooks

[Suvam-paul145]

Contributor Guidelines

• I have read the guidelines and discussion

Is your feature request related to a problem? Please describe.

The entire codebase has only 2 unit test files (both in src/plays/savings-calculator/). Critical infrastructure like custom hooks, utility functions, service layers, and the search/filter system have zero test coverage. The testing framework (Jest + React Testing Library) is properly configured but barely utilized.

Describe the solution you'd like.

• Write unit tests for all custom hooks using @testing-library/react-hooks
• Write unit tests for utility functions (commonUtils.js, formatCount.ts, coverImageUtil.js)
• Write tests for the search query parser (search-helper.js → ParseQuery, QueryDBTranslator)
• Write integration tests for service functions with mocked GraphQL responses
• Establish a test coverage threshold (e.g., 60% for src/common/) in CI

Affected Files:

• src/common/hooks/useFetch.js — no tests
• src/common/hooks/useCacheResponse.ts — no tests
• src/common/hooks/useContributors.js — no tests
• src/common/hooks/useFeaturedPlays.js — no tests
• src/common/hooks/useGitHub.js — no tests
• src/common/hooks/useLikePlays.js — no tests
• src/common/hooks/useLocalStorage.js — no tests
• src/common/utils/commonUtils.js — no tests
• src/common/utils/formatCount.ts — no tests
• src/common/services/plays.js — no tests
• src/common/search/search-helper.js — no tests

Describe alternatives you've considered.

No alternative required

Screenshot / Screenshare

No response

Additional context

No response

Record

• I have checked the existing issues
• I have read the Contributing Guidelines
• I want to work on this issue
• I am a Hacktoberfest contributor

Code of Conduct

• I agree to follow this project's Code of Conduct

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