'use strict'; require('../common'); const assert = require('assert'); const net = require('net'); const server1 = net.createServer(function(socket) { }); const server2 = net.createServer(function(socket) { }); server1.listen(0, function() { server2.on('error', function(error) { assert.strictEqual(true, error.message.indexOf('EADDRINUSE') >= 0); server1.close(); }); server2.listen(this.address().port); });