import archiver from 'archiver'

const archive = archiver('zip')
const stream = ...
archive.append(stream, { name: 'archive.zip'})

res.body = archive

const archiver = require('archiver')
const Stream = require('stream')
const CustomStream = require('./test-helpers/stream.js')
const isReadableStream = require('./lib/is-readable-stream.js')

const stream = new Stream()
const archive = archiver('zip')
const customstream = new CustomStream.Readable()

console.log(stream instanceof Stream) // true
console.log(customstream instanceof Stream) // false
console.log(archive instanceof Stream) // false

console.log(isReadableStream(stream)) // true
console.log(isReadableStream(customstream)) // true
console.log(isReadableStream(archive)) // true