evt-emitter/test/tests.js

Node's events module, with an evt-listener factory bundled.

var expect = require('chai').expect;
//node's built in event's
var EventEmitter = require('events').EventEmitter;
var defaultEmitter = new EventEmitter();

//our emitter, the decorated version
var ourEventEmitter = require('../');
var ourEmitter = new ourEventEmitter();

describe('validation checks', function() {

  it('should not overwrite the default events module', function() {
    expect(EventEmitter.prototype.createListener).to.equal(undefined);
  });

  it('should expose the same interface as the built in events module', function() {
    var sameInterface = Object.keys(defaultEmitter).concat(Object.keys(EventEmitter.prototype)).every(function(prop) {
      return (typeof ourEmitter[prop] === typeof defaultEmitter[prop]);
    });

    expect(sameInterface).to.be.true;
  });

  it('should have the createListener factory which returns an EventListener', function() {
    expect(typeof ourEmitter.createListener).to.equal('function');

    var EventListener = require('evt-listener').EventListener;
    var listener = ourEmitter.createListener('eventName');

    expect(listener).to.be.an.instanceof(EventListener);
    expect(listener.emitter).to.equal(ourEmitter);
    //check out evt-listener's tests - https://github.com/bmullan91/evt-listener/tree/master/test
  });

  it('should have expose the Class as a property - revealing module pattern', function() {
    expect(ourEventEmitter.EventEmitter).to.equal(ourEventEmitter);
  });

});