nodejs/test/parallel/test-dgram-connect-send-callback-buffer.js

'use strict';

const common = require('../common');
const assert = require('assert');
const dgram = require('dgram');

const client = dgram.createSocket('udp4');

const buf = Buffer.allocUnsafe(256);

const onMessage = common.mustSucceed((bytes) => {
  assert.strictEqual(bytes, buf.length);
  client.close();
});

client.bind(0, common.mustCall(() => {
  client.connect(client.address().port, common.mustCall(() => {
    client.send(buf, onMessage);
  }));
}));