'use strict'; const common = require('../common'); const assert = require('assert'); const dgram = require('dgram'); const client = dgram.createSocket('udp4'); const timer = setTimeout(function() { throw new Error('Timeout'); }, common.platformTimeout(200)); const buf = Buffer.allocUnsafe(256); const offset = 20; const len = buf.length - offset; const messageSent = common.mustCall(function messageSent(err, bytes) { assert.notEqual(bytes, buf.length); assert.equal(bytes, buf.length - offset); clearTimeout(timer); client.close(); }); client.send(buf, offset, len, common.PORT, '127.0.0.1', messageSent);