node/test/parallel/test-net-listen-close-server-callback-is-not-function.js

var assert = require('assert');
var common = require('../common');
var net = require('net');

var server = net.createServer(assert.fail);
var closeEvents = 0;

server.on('close', function() {
  ++closeEvents;
});

server.listen(common.PORT, function() {
  assert(false);
});

server.close('bad argument');

process.on('exit', function() {
  assert.equal(closeEvents, 1);
});