'use strict'; const common = require('../common'); const assert = require('assert'); const net = require('net'); const server = net.createServer(common.mustCall((socket) => { assert.strictEqual(socket.remotePort, common.PORT); socket.end(); socket.on('close', function() { server.close(); }); })).listen(0).on('listening', common.mustCall(function() { const client = net.connect({ host: '127.0.0.1', port: this.address().port, localPort: common.PORT, }).on('connect', common.mustCall(() => { assert.strictEqual(client.localPort, common.PORT); })); }));