shared.ts

   1 import { Express } from 'express'
   2 import { Server } from 'http'
   3 import { AddressInfo } from 'net'
   4
   5 function randomListen (app: Express) {
   6   return new Promise<Server>(res => {
   7     const server = app.listen(0, () => res(server))
   8   })
   9 }
  10
  11 function getPort (server: Server) {
  12   const address = server.address() as AddressInfo
  13
  14   return address.port
  15 }
  16
  17 function terminateServer (server: Server) {
  18   if (!server) return Promise.resolve()
  19
  20   return new Promise<void>((res, rej) => {
  21     server.close(err => {
  22       if (err) return rej(err)
  23
  24       return res()
  25     })
  26   })
  27 }
  28
  29 export {
  30   randomListen,
  31   getPort,
  32   terminateServer
  33 }