minecraft-protocol/test/common/util.js

Parse and serialize minecraft packets, plus authentication and encryption.

const net = require('net')

const getPort = () => new Promise(resolve => {
  const server = net.createServer()
  server.listen(0, '127.0.0.1')
  server.on('listening', () => {
    const { port } = server.address()
    server.close(() => resolve(port))
  })
})

module.exports = { getPort }