# Testing Patterns

**Analysis Date:** 2026-03-13

## Test Infrastructure

**Status: NO TESTING INFRASTRUCTURE DETECTED**

The codebase currently lacks automated testing configuration and test files.

## Test Framework

**Runner:** Not configured
- No Jest configuration detected
- No Vitest configuration detected  
- No Playwright/Cypress configuration detected

**Assertion Library:** Not configured
- No testing libraries in dependencies

**Run Commands:** Not available
- `package.json` only defines: `"build": "vite build"`
- No test scripts present

## Test File Organization

**Current State:**
- No test files in source code (`*.test.ts`, `*.spec.ts`, `*.test.tsx`, `*.spec.tsx`)
- All test file matches were from `node_modules/` (zod library tests)

**File Pattern:** Not established

**Test Directory Structure:** Not implemented

## Code Quality Indicators

### TODO/FIXME Comments
Minimal technical debt markers found:
- `MobileSettingView.tsx` line 31: `placeholder="+63 XXX XXX XXXX"` (placeholder text, not TODO)

### Code Complexity
View component line counts (reasonable for view components):
```
FlashMemoryView.tsx    112 lines
ADCSettingView.tsx      83 lines
LevelSettingView.tsx    78 lines
MobileSettingView.tsx   70 lines
RainfallSettingView.tsx 69 lines
NetworkSetupView.tsx    69 lines
DateTimeSettingView.tsx 65 lines
CalibrationView.tsx     63 lines
RainfallView.tsx        63 lines
SettingView.tsx         76 lines
LoginView.tsx           61 lines
GraphView.tsx           51 lines
EVAPSettingView.tsx     54 lines
SirenSettingView.tsx    71 lines
GPRSSettingView.tsx     68 lines
StationInfoView.tsx     40 lines
```

**Total view code:** ~1,092 lines across 16 view files

### Component Complexity
UI components (`src/app/components/ui/`):
- Range: 6 lines (`utils.ts`) to 168 lines (`form.tsx`)
- Most components: 20-90 lines
- Pattern: Small, focused components following shadcn/ui conventions

## Missing Testing Infrastructure

### Critical Gaps
1. **No unit test framework** - Components cannot be unit tested
2. **No integration tests** - Route integration untested
3. **No E2E tests** - User flows untested
4. **No test scripts** - No CI/CD integration possible
5. **No mocking strategy** - External dependencies not mockable

### Testing Dependencies to Add
For comprehensive testing, the following would be needed:

```json
{
  "devDependencies": {
    "vitest": "^2.x",
    "@testing-library/react": "^14.x",
    "@testing-library/jest-dom": "^6.x",
    "@testing-library/user-event": "^14.x",
    "jsdom": "^24.x"
  }
}
```

Or alternatively with Jest:

```json
{
  "devDependencies": {
    "jest": "^29.x",
    "@testing-library/react": "^14.x",
    "@testing-library/jest-dom": "^6.x",
    "ts-jest": "^29.x",
    "jest-environment-jsdom": "^29.x"
  }
}
```

## Recommended Testing Strategy

### Priority 1: Unit Tests for UI Components
Test critical UI primitives in `src/app/components/ui/`:
- `button.tsx` - Variant rendering, click handling
- `card.tsx` - Composition pattern
- `input.tsx` - Value handling, focus states
- `switch.tsx` - Toggle behavior

### Priority 2: View Component Tests
Test user interactions in views:
- Form submissions
- State changes
- Navigation triggers

### Priority 3: Integration Tests
Test route configuration:
- Route rendering
- Navigation flow
- Layout composition

## Testing Conventions to Establish

### Test File Naming
Recommended pattern (when tests are added):
- Co-located: `[Component].test.tsx` next to `[Component].tsx`
- Or separate: `__tests__/[Component].test.tsx`

### Test Structure (Recommended)
```typescript
// button.test.tsx - Example pattern to follow
import { describe, it, expect, vi } from 'vitest';
import { render, screen, fireEvent } from '@testing-library/react';
import { Button } from './button';

describe('Button', () => {
  it('renders with default variant', () => {
    render(<Button>Click me</Button>);
    expect(screen.getByText('Click me')).toBeInTheDocument();
  });

  it('handles click events', () => {
    const handleClick = vi.fn();
    render(<Button onClick={handleClick}>Click me</Button>);
    fireEvent.click(screen.getByText('Click me'));
    expect(handleClick).toHaveBeenCalled();
  });

  it('renders different variants', () => {
    const { rerender } = render(<Button variant="destructive">Delete</Button>);
    // Assert destructive styling
    
    rerender(<Button variant="outline">Cancel</Button>);
    // Assert outline styling
  });
});
```

### Mocking Strategy (Recommended)

**External Libraries:**
- Mock `lucide-react` icons for snapshot stability
- Mock `@radix-ui` components at boundary

**Browser APIs:**
- Mock `document.getElementById()` for scroll tests
- Mock `window` events if needed

**Example Mock Pattern:**
```typescript
// Mock scroll behavior
const scrollByMock = vi.fn();
Object.defineProperty(document, 'getElementById', {
  value: vi.fn(() => ({ scrollBy: scrollByMock })),
});
```

## Coverage Recommendations

### Minimum Targets
- **UI Components:** 80% coverage (small, critical components)
- **View Components:** 60% coverage (user interaction paths)
- **Utility Functions:** 90% coverage (business logic)
- **Routes:** Integration tests for all paths

### Critical Paths to Test
1. Login form submission
2. Sidebar navigation
3. File selection in FlashMemoryView
4. Settings toggle switches
5. Navigation button scrolling

## CI/CD Integration

### GitHub Actions (Recommended)
When tests are added, include in workflow:

```yaml
name: Test
on: [push, pull_request]
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: pnpm/action-setup@v2
      - run: pnpm install
      - run: pnpm test
      - run: pnpm test:coverage
```

## Testing Documentation Gap

**Issue:** No testing guidelines in existing documentation

The `Guidelines.md` file (458 lines) covers:
- Design patterns
- Color palettes
- Component naming
- Touchscreen guidelines

But does NOT cover:
- Testing conventions
- Test file organization
- Mocking patterns
- Coverage requirements

## Action Items for Testing

1. **Add testing dependencies** (Vitest + React Testing Library recommended)
2. **Create `vitest.config.ts`** with jsdom environment
3. **Add test scripts** to `package.json`
4. **Write initial tests** for critical UI components
5. **Document testing patterns** in Guidelines.md
6. **Set up CI/CD** to run tests on PR
7. **Establish coverage thresholds**

---

*Testing analysis: 2026-03-13*

**Summary:** This codebase currently has no testing infrastructure. All testing patterns documented above are recommendations for implementation rather than observed conventions.