feat(frontend): add Jest unit testing infrastructure #6432
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #6432 +/- ##
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Just adding a prop and to the deploy to production pipeline and should be good to go. Thanks for the initiative!
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January 15, 2026 13:47
- Add Jest with ts-jest for TypeScript support - Add jest.config.js with path aliases matching tsconfig - Add npm scripts: test:unit, test:unit:watch, test:unit:coverage - Migrate format.js to format.ts for better Jest compatibility - Add unit tests for featureFilterParams utility Tests cover: - buildUrlParams: is_archived always explicitly set (never undefined) - buildApiFilterParams: is_archived always included in API params - getFiltersFromParams: URL param parsing - hasActiveFilters: filter state detection This prevents regression of the archived features bug where is_archived was undefined instead of explicitly 'false'. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
Runs Jest unit tests on PRs that modify frontend/ files. Runs on all PRs including drafts (tests are fast and cheap). Lint and typecheck can be added later once those are cleaned up. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
- Add 45 unit tests for Format utility pure functions - Remove unnecessary .toString() in countdown: parseInt(x.toString()) → Math.floor(x) - Remove unnecessary .toString() in shortenNumber: +parseFloat(x.toString()).toFixed(1) → +x.toFixed(1) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
- Add explicit moment import to fix TypeScript UMD global error - Simplify money() to consistently return defaultValue for null/undefined/0 - Update tests to reflect new behavior 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
- Add clearMocks: true to Jest config for automatic mock cleanup - Add unit tests job to frontend-deploy-production.yml workflow - Update package-lock.json after rebase Addresses review comments from @Zaimwa9 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
Address security warning from github-advanced-security bot by adding explicit permissions block with minimal `contents: read` scope. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Replace repetitive individual test cases with table-driven tests using Jest's it.each tagged template syntax. This improves test readability by grouping related test cases together and making input/output pairs easier to scan. Co-Authored-By: Claude Opus 4.5 <[email protected]>
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One comment and ready to be approved
| let result = str | ||
| for (let i = 0; i < Utils.accents.length; i++) { | ||
| str = str.replace(Utils.accents[i].letters, Utils.accents[i].base) | ||
| result = result.replace(Utils.accents[i].letters, Utils.accents[i].base) |
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Just to confirm Utils is global and not breaking here ?
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Summary
Add Jest unit testing infrastructure to the frontend codebase to enable fast, isolated unit tests alongside the existing TestCafe E2E tests.
Closes #6442
Changes
Jest Configuration
ts-jestpreset for TypeScript supportcommon/,components/,project/)common/andweb/directoriesCI/CD Integration
frontend-pull-request.yml)frontend-deploy-production.ymlInitial Test Coverage
featureFilterParamsutilitybuildUrlParams,buildApiFilterParams,getFiltersFromParams,hasActiveFiltersformatutilityshortenNumber,nearestTen,camelCase,enumeration,fullName,initialAndLastName,truncateText,ordinal,money,cssImage,trimAndHighlightSpaces,userDisplayNameformat.jsto TypeScript (format.ts) with proper type annotationsTest Style
it.eachwith tagged template literals for table-driven testsDependencies Added
jest,ts-jest,@types/jestHow did you test this code?
cd frontend npm run test:unitAll 102 tests pass.
Checklist
docs/if required so people know about the feature!