Writing Integration Tests

test('user authentication flow', async () => {
  // 1. Register user
  const user = await registerUser(userData);
  
  // 2. Verify email
  await verifyEmail(user.verificationToken);
  
  // 3. Login
  const { token } = await login(userData);
  
  // 4. Access protected resource
  const response = await request(app)
    .get('/api/protected')
    .set('Authorization', `Bearer ${token}`);
  
  expect(response.status).toBe(200);
});