@fastify/reply-from/test/on-error.test.js

forward your HTTP request to another server, for fastify

'use strict'

const t = require('tap')
const Fastify = require('fastify')
const From = require('..')
const got = require('got')
const FakeTimers = require('@sinonjs/fake-timers')

const clock = FakeTimers.createClock()

t.test('on-error', async (t) => {
  const target = Fastify()
  t.teardown(target.close.bind(target))

  target.get('/', (_request, reply) => {
    t.pass('request arrives')

    clock.setTimeout(() => {
      reply.status(200).send('hello world')
      t.end()
    }, 1000)
  })

  await target.listen({ port: 0 })

  const instance = Fastify()
  t.teardown(instance.close.bind(instance))

  instance.register(From, { http: { requestOptions: { timeout: 100 } } })

  instance.get('/', (_request, reply) => {
    reply.from(`http://localhost:${target.server.address().port}/`,
      {
        onError: (reply, { error }) => {
          t.same(error, {
            statusCode: 504,
            name: 'FastifyError',
            code: 'FST_REPLY_FROM_GATEWAY_TIMEOUT',
            message: 'Gateway Timeout'
          })
          reply.code(error.statusCode).send(error)
        }
      })
  })

  await instance.listen({ port: 0 })

  try {
    await got.get(`http://localhost:${instance.server.address().port}/`, { retry: 0 })
  } catch (err) {
    t.equal(err.response.statusCode, 504)
    t.match(err.response.headers['content-type'], /application\/json/)
    t.same(JSON.parse(err.response.body), {
      statusCode: 504,
      code: 'FST_REPLY_FROM_GATEWAY_TIMEOUT',
      error: 'Gateway Timeout',
      message: 'Gateway Timeout'
    })
    clock.tick(1000)
    return
  }

  t.fail()
})