'use strict'; var assert = require('assert'); var common = require('../common'); var dgram = require('dgram'); var buf = Buffer.alloc(1024, 42); var socket = dgram.createSocket('udp4'); var closeEvents = 0; socket.send(buf, 0, buf.length, common.PORT, 'localhost'); // if close callback is not function, ignore the argument. socket.close('bad argument'); socket.on('close', function() { ++closeEvents; }); process.on('exit', function() { assert.equal(closeEvents, 1); });