'use strict'; const common = require('../common'); const assert = require('assert'); const net = require('net'); const server = net.createServer(common.mustCall(function(s) { server.close(); s.end(); })).listen(0, '127.0.0.1', common.mustCall(function() { const socket = net.connect(this.address().port, '127.0.0.1'); socket.on('end', common.mustCall(() => { assert.strictEqual(socket.writable, true); socket.write('hello world'); })); }));