Node.js http server with random responses time for testing purposes

server.js

const http = require('http');


function randomInt(min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

function randomIDGenerator(length) {
  var result = '';
  var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  var charactersLength = characters.length;
  for ( var i = 0; i < length; i++ ) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
   return result;
}

const requestListener = function (req, res) {
  setTimeout(() => {
    res.writeHead(200);
    res.end(randomIDGenerator(32));
  }, randomInt(1000, 10000));
}

const server = http.createServer(requestListener);
server.listen(8080);