node/test/parallel/test-dgram-send-address-types.js

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

const port = common.PORT;
const buf = Buffer.from('test');
const client = dgram.createSocket('udp4');

const onMessage = common.mustCall((err, bytes) => {
  assert.ifError(err);
  assert.strictEqual(bytes, buf.length);
}, 6);

// valid address: false
client.send(buf, port, false, onMessage);

// valid address: empty string
client.send(buf, port, '', onMessage);

// valid address: null
client.send(buf, port, null, onMessage);

// valid address: 0
client.send(buf, port, 0, onMessage);

// valid address: undefined
client.send(buf, port, undefined, onMessage);

// valid address: not provided
client.send(buf, port, onMessage);

const expectedError =
  /^TypeError: Invalid arguments: address must be a nonempty string or falsy$/;

// invalid address: object
assert.throws(() => {
  client.send(buf, port, []);
}, expectedError);

// invalid address: nonzero number
assert.throws(() => {
  client.send(buf, port, 1);
}, expectedError);

// invalid address: true
assert.throws(() => {
  client.send(buf, port, true);
}, expectedError);

client.unref();