'use strict'; const common = require('../common'); const assert = require('assert'); const dgram = require('dgram'); const client = dgram.createSocket('udp4'); const messageSent = common.mustCall((err, bytes) => { assert.strictEqual(bytes, buf1.length + buf2.length); }); const buf1 = Buffer.alloc(256, 'x'); const buf2 = Buffer.alloc(256, 'y'); client.on('listening', common.mustCall(() => { const port = client.address().port; client.connect(port, common.mustCall(() => { client.send([buf1, buf2], messageSent); })); })); client.on('message', common.mustCall((buf, info) => { const expected = Buffer.concat([buf1, buf2]); assert.ok(buf.equals(expected), 'message was received correctly'); client.close(); })); client.bind(0);