# Session Summary: Frontend Unit Tests Implementation

**Date:** 2025-12-11
**Session ID:** 1339bffa-8d99-4bf5-a5c0-5458630ed9fc

---

## Objective

Implement frontend testing infrastructure and unit tests per `specs/03-implementation/testing-strategy.md`.

---

## Changes Made

### 1. Test Infrastructure Setup

| File                          | Description                                               |
| ----------------------------- | --------------------------------------------------------- |
| `frontend/vitest.config.ts`   | Vitest config with jsdom, path aliases, coverage settings |
| `frontend/vitest.setup.ts`    | Global mocks for sonner, next/navigation, apiClient       |
| `frontend/lib/test-utils.tsx` | QueryClient wrapper for React Query hook testing          |
| `frontend/package.json`       | Added test scripts: `test`, `test:watch`, `test:coverage` |

**Dependencies Installed:**
- `vitest`
- `@vitejs/plugin-react`
- `@testing-library/react`
- `@testing-library/jest-dom`
- `@testing-library/user-event`
- `jsdom`

---

### 2. Unit Tests - Hooks (52 tests)

| Test File                                    | Tests |
| -------------------------------------------- | ----- |
| `hooks/__tests__/use-correspondence.test.ts` | 12    |
| `hooks/__tests__/use-drawing.test.ts`        | 10    |
| `hooks/__tests__/use-rfa.test.ts`            | 10    |
| `hooks/__tests__/use-projects.test.ts`       | 10    |
| `hooks/__tests__/use-users.test.ts`          | 10    |

---

### 3. Unit Tests - Services (49 tests)

| Test File                                               | Tests |
| ------------------------------------------------------- | ----- |
| `lib/services/__tests__/correspondence.service.test.ts` | 11    |
| `lib/services/__tests__/project.service.test.ts`        | 12    |
| `lib/services/__tests__/master-data.service.test.ts`    | 26    |

---

### 4. Component Tests (17 tests)

| Test File                                 | Tests |
| ----------------------------------------- | ----- |
| `components/ui/__tests__/button.test.tsx` | 17    |

---

## Final Results

```
Test Files  9 passed (9)
Tests       118 passed (118)
Duration    9.06s
```

---

## Test Coverage Areas

- ✅ Query Hooks (list and detail fetching)
- ✅ Mutation Hooks (create, update, delete, workflow)
- ✅ Service Layer (API client calls)
- ✅ Cache Keys (query cache key generation)
- ✅ Toast Notifications (success and error toasts)
- ✅ Error Handling (API error states)
- ✅ Component Variants, Sizes, States

---

## How to Run Tests

```bash
cd frontend

# Run all tests once
pnpm test --run

# Run tests in watch mode
pnpm test:watch

# Run with coverage
pnpm test:coverage
```

---

## Remaining Optional Work

- [ ] E2E tests with Playwright
- [ ] Additional component tests (Form, Table, Dialog)
- [ ] Integration tests for page components
