mockPool.intercept({
  path: '/echo',
  method: 'GET',
  headers: {
    'User-Agent': 'undici',
    Host: 'example.com'
  }
}).reply(({ headers }) => ({ statusCode: 200, data: { message: headers.get('message') }})))

const { statusCode, body, headers } = await request('http://localhost:3000', {
  headers: {
    message: 'hello world!'
  }
})

console.log('response received', statusCode) // response received 200
console.log('headers', headers) // { 'content-type': 'application/json' }

for await (const data of body) {
  console.log('data', data.toString('utf8')) // { "message":"hello world!" }
}