'use strict'; const common = require('../common'); const assert = require('assert'); const http = require('http'); const server1 = http.createServer(common.fail); server1.listen(0, '127.0.0.1', common.mustCall(function() { const server2 = http.createServer(common.fail); server2.listen(this.address().port, '127.0.0.1', common.fail); server2.on('error', common.mustCall(function(e) { assert.strictEqual(e.code, 'EADDRINUSE'); server1.close(); })); }));