How to use the events.defaultMaxListeners function in events

process.on('exit', () => {
  assert.strictEqual(warningTimes, 1);
});

process.stderr.write = (data) => {
  if (writeTimes === 0)
    assert.ok(leakWarning.test(data));
  else
    assert.fail('stderr.write should be called only once');

  writeTimes++;
};

const oldDefault = EventEmitter.defaultMaxListeners;
EventEmitter.defaultMaxListeners = 1;

const e = new EventEmitter();
e.on('hello', () => {});
e.on('hello', () => {});

// TODO: Figure out how to validate console. Currently,
// there is no obvious way of validating that console
// exists here exactly when it should.

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 20;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
  root: appRoot,
  source: appRoot + '**/*.js',
  html: appRoot + '**/*.html',
  style: 'styles/**/*.css',
  output: 'dist/',
  doc:'./doc',
  e2eSpecsSrc: 'test/e2e/src/*.js',
  e2eSpecsDist: 'test/e2e/dist/',
  packageName: pkg.name,
  useTypeScriptForDTS: false,
  importsToAdd: [],

// Licensed under the MIT license. See LICENSE file in the project root for full license information.
'use strict';
/*jshint esversion: 6 */

const path = require('path');
const fs = require('fs');
const findRoot = require('find-root');
const runAll = require('npm-run-all');
const async = require('async');
const promisify = require('es6-promisify');
var EventEmitter = require('events');
var config = require('./config.json');
const debug = require('debug')('azure-iot-tools-build-parallel');

// See section titled "About MaxListenersExceededWarning" in https://github.com/mysticatea/npm-run-all/blob/HEAD/docs/node-api.md
EventEmitter.defaultMaxListeners = 30;

/**
 * Print usage information
 */
var usage = function () {
  console.log('usage: node ' + __filename + ' task');
  console.log('where task is one of:');
  for (var taskName in config.tasks) {
    if (config.tasks.hasOwnProperty(taskName)) {
      console.log("  " + taskName + " - " + config.tasks[taskName].description);
    }
  }
};

/**
 * Do miscellaneous work necessary to set up the running of this script.

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 20;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
  root: appRoot,
  source: appRoot + '**/*.js',
  html: appRoot + '**/*.html',
  style: 'styles/**/*.css',
  output: 'dist/',
  doc:'./doc',
  e2eSpecsSrc: 'test/e2e/src/*.js',
  e2eSpecsDist: 'test/e2e/dist/',
  packageName: pkg.name,
  ignore: [],
  useTypeScriptForDTS: false,

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 20;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
  root: appRoot,
  source: appRoot + '**/*.js',
  html: appRoot + '**/*.html',
  style: 'styles/**/*.css',
  output: 'dist/',
  doc:'./doc',
  unitTests: 'test/**/*.js',
  e2eSpecsSrc: 'test/e2e/src/*.js',
  e2eSpecsDist: 'test/e2e/dist/',
  packageName: pkg.name,
  ignore: [],

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 20;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
    root: appRoot,
    source: appRoot + '**/*.js',
    html: appRoot + '**/*.html',
    style: 'styles/**/*.css',
    output: 'dist/',
    doc:'./doc',
    sample: 'sample',
    e2eSpecsSrc: 'test/e2e/src/*.js',
    e2eSpecsDist: 'test/e2e/dist/',
    packageName: pkg.name,
    useTypeScriptForDTS: false,

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 20;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
  root: appRoot,
  source: appRoot + '**/*.js',
  html: appRoot + '**/*.html',
  style: 'styles/**/*.css',
  output: 'dist/',
  doc:'./doc',
  e2eSpecsSrc: 'test/e2e/src/*.js',
  e2eSpecsDist: 'test/e2e/dist/',
  packageName: pkg.name,
  ignore: [],
  useTypeScriptForDTS: false,

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 5;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
  root: appRoot,
  source: appRoot + '**/*.js',
  style: 'styles/**/*.css',
  output: 'dist/',
  doc:'./doc',
  test: 'test/**/*.js',
  exampleSource: 'doc/example/',
  exampleOutput: 'doc/example-dist/',
  packageName: pkg.name,
  ignore: [],
  useTypeScriptForDTS: false,

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 20;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
  root: appRoot,
  source: appRoot + '**/*.js',
  html: appRoot + '**/*.html',
  style: 'styles/**/*.css',
  output: 'dist/',
  doc:'./doc',
  e2eSpecsSrc: 'test/e2e/src/*.js',
  e2eSpecsDist: 'test/e2e/dist/',
  packageName: pkg.name,
  ignore: [],
  useTypeScriptForDTS: false,

var path = require('path');
var fs = require('fs');

// hide warning //
var emitter = require('events');
emitter.defaultMaxListeners = 20;

var appRoot = 'src/';
var pkg = JSON.parse(fs.readFileSync('./package.json', 'utf-8'));

var paths = {
  root: appRoot,
  source: appRoot + '**/*.js',
  html: appRoot + '**/*.html',
  style: 'styles/**/*.css',
  output: 'dist/',
  doc:'./doc',
  e2eSpecsSrc: 'test/e2e/src/*.js',
  e2eSpecsDist: 'test/e2e/dist/',
  packageName: pkg.name,
  ignore: [],
  useTypeScriptForDTS: false,