Writing Integration Tests

const agent = supertest(app);

describe('API Integration', () => {
  it('should create and retrieve a resource', async () => {
    const createResponse = await agent
      .post('/api/items')
      .send({ name: 'Test Item' })
      .expect(201);
    
    const itemId = createResponse.body.id;
    
    const getResponse = await agent
      .get(`/api/items/${itemId}`)
      .expect(200);
      
    expect(getResponse.body.name).toBe('Test Item');
  });
});