TestStrategy

// Unit Test Example
import { jest } from '@jest/globals';

// Mock API response
jest.mock('openai', () => ({
  ChatCompletion: {
    create: jest.fn().mockResolvedValue({
      choices: [{
        message: {
          content: 'Mocked response'
        }
      }]
    })
  }
}));

describe('AI Service Tests', () => {
  test('should handle chat completion', async () => {
    const response = await aiService.chat('Test prompt');
    expect(response).toBe('Mocked response');
  });
  
  test('should handle errors gracefully', async () => {
    jest.spyOn(openai.ChatCompletion, 'create')
        .mockRejectedValue(new Error('API Error'));
    
    await expect(aiService.chat('Test'))
          .rejects.toThrow('API Error');
  });
});

// IntegrateTest
describe('Integration Tests', () => {
  test('real API call', async () => {
    const response = await fetch('/api/chat', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        message: 'Hello'
      })
    });
    
    expect(response.status).toBe(200);
    const data = await response.json();
    expect(data).toHaveProperty('response');
  });
});