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Resolve "test(coverage): achieve 100% test coverage - phase 1 critical files"

Shanmukha varma Lanke requested to merge phase1-test into develop

Overview

This MR improves the overall test coverage of the project by adding missing unit and integration tests for critical low-coverage files.

The goal of this phase is to increase code reliability and reduce the risk of untested behavior by ensuring all uncovered branches, edge cases, and conditional paths are properly tested.

What does this MR do and why?

The current codebase coverage is at 94.76%, leaving several critical files partially untested. Untested code paths can lead to hidden bugs, regressions, and unstable behavior during future feature development.

This MR focuses on improving coverage for the 5 lowest-covered files identified from the coverage report.

The approach taken:

  • Analyze uncovered lines using bun run test:coverage
  • Add targeted tests for conditional branches and edge cases
  • Validate all rendering states and interactions
  • Improve statement, branch, function, and line coverage without modifying production logic

This change is purely test-focused and introduces no functional/business logic changes.

Changes Made

  • Added missing unit tests
  • Added integration tests for UI flows
  • Covered fallback and error rendering paths
  • Covered conditional branches and edge cases
  • Improved branch and line coverage

Files Updated

  • error.tsx
  • vendor.tsx
  • dForm.tsx
  • KYPQueuePage.tsx
  • aPrescriptionPage.tsx

Technical Details

  • Added mocks for external dependencies where required
  • Added coverage for previously skipped execution paths
  • Added interaction-based tests for component behavior
  • Validated loading, error, empty, and success states

Type of Change

  • 🐛 Bug fix (non-breaking change that fixes an issue)
  • ✨ New feature (non-breaking change that adds functionality)
  • 💥 Breaking change (fix or feature that would cause existing functionality to change)
  • 📝 Documentation update
  • 🎨 UI/UX improvement
  • ♻️ Refactor (no functional changes)
  • ⚡ Performance improvement
  • 🧪 Test update
  • 🔧 Configuration change
  • 🚨 Security fix

Related Issues / References

Closes #337

Screenshots or Screen Recordings

Not applicable — no UI changes introduced.

How to Set Up and Validate Locally

  1. Checkout the MR branch
git checkout <branch-name>
  1. Install dependencies
bun install
  1. Run tests
bun run test
  1. Run coverage report
bun run test:coverage
  1. Run lint checks
bun run lint

Expected Result

  • All tests pass successfully
  • Coverage report reflects improved coverage
  • Target files achieve 100% coverage
  • No linting or formatting issues

Testing Done

  • Manual testing completed
  • Unit tests added/updated

Test Cases Covered

Scenario Expected Result Status
Error state rendering Error UI renders correctly ✅
Conditional branch execution Branch executes as expected ✅
Empty/fallback states Fallback UI handled properly ✅
Component interaction flows Interactions trigger expected behavior ✅
Loading and success states Proper rendering and transitions ✅

Code Quality Checklist

Code Standards

  • Code follows project conventions (naming, structure, formatting)
  • No console.log() or debugger statements left in code
  • No unused imports, variables, or functions
  • No duplicate code and use of existing components for reusability
  • i18n check passed with no hardcoded strings in codebase for i18n support
  • TypeScript types are properly defined (no any unless justified)
  • ESLint and Prettier checks pass
bun run lint

React Best Practices

  • Components are properly split and single-responsibility
  • Hooks follow rules (no conditional hooks, proper dependencies)
  • State management is appropriate (local vs global state)
  • No unnecessary re-renders (memoization used where needed)
  • Event handlers are properly cleaned up

Component Patterns

  • shadcn/ui components used correctly
  • Tailwind classes follow utility-first approach
  • Responsive design considered (mobile-first if applicable)
  • Accessibility attributes included (aria-*, role, etc.)
  • Icons from lucide-react used consistently

API & Data Fetching

  • Loading and error states handled

Error Handling

  • Errors are caught and handled gracefully
  • User-friendly error messages displayed

Documentation

  • README.md updated (if setup steps changed)
  • .env.example updated (if new env vars added)
  • CHANGELOG.md updated (if applicable)

Known Limitations / Technical Debt

  • This MR only focuses on the first phase of coverage improvements.
  • Remaining uncovered files will be addressed in subsequent phases.

Additional Notes

  • No production code changes included
  • No API or configuration changes introduced
  • This MR is safe for merge as it only extends test coverage

MR Acceptance Checklist

Evaluate this MR against the MR acceptance checklist to ensure quality, maintainability, reliability, and stability before merge.

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