mathjs/examples/node_modules/events/tests/events-list.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

'use strict';

var EventEmitter = require('../');
var assert = require('assert');

var EE = new EventEmitter();
var m = function() {};
EE.on('foo', function() {});
assert.equal(1, EE.eventNames().length);
assert.equal('foo', EE.eventNames()[0]);
EE.on('bar', m);
assert.equal(2, EE.eventNames().length);
assert.equal('foo', EE.eventNames()[0]);
assert.equal('bar', EE.eventNames()[1]);
EE.removeListener('bar', m);
assert.equal(1, EE.eventNames().length);
assert.equal('foo', EE.eventNames()[0]);

if (typeof Symbol !== 'undefined') {
  var s = Symbol('s');
  EE.on(s, m);
  assert.equal(2, EE.eventNames().length);
  assert.equal('foo', EE.eventNames()[0]);
  assert.equal(s, EE.eventNames()[1]);
  EE.removeListener(s, m);
  assert.equal(1, EE.eventNames().length);
  assert.equal('foo', EE.eventNames()[0]);
}