# Testing Guide

## Framework

Jest (backend), Vitest (frontend)

## Test Structure

```
tests/
├── unit/           # Unit tests
├── integration/    # Integration tests
└── e2e/            # End-to-end tests
```

## Running Tests


```bash
# Run all tests
npm run test

# Run with coverage
npm run test -- --coverage

# Run specific test file
npm run test -- path/to/test.ts
```

## Coverage Requirements

- Minimum 80% coverage
- All public APIs must be tested
- All error paths must be tested

## Test Patterns

- Arrange-Act-Assert pattern
- One assertion per test when possible
- Descriptive test names
- Mock external dependencies