neat bit of code for spoofing events at random(ish) intervals

pusher_mock.js

/* Abstract event binding
--------------------------------------------------------*/
var AbstractEventsDispatcher = function(){};
AbstractEventsDispatcher.prototype = {
  callbacks: {},
  
  bind: function(event_name, callback){
    this.callbacks[event_name] = this.callbacks[event_name] || [];
    this.callbacks[event_name].push(callback);
    return this;// chainable
  },
  
  trigger: function(event_name, data){
    this.dispatch(event_name, data);
    return this;
  },
  
  dispatch: function(event_name, data){
    var chain = this.callbacks[event_name];
    if(typeof chain == 'undefined') return; // no callbacks for this event
    for(var i = 0; i < chain.length; i++){
      chain[i]( data )
    }
  }
};

/* Periodically send out dummy events 
--------------------------------------------*/
var PusherMock = function( interval ){
  var self = this;
  
  var nextInterval = function(){
    return Math.round(Math.random() * interval * 2)
  }
  
  var nextTick = function(){
    var event = PusherMock.events[Math.floor(Math.random() * PusherMock.events.length)];
    self.trigger(event.event, event.data);
    setTimeout(nextTick, nextInterval());
  }

  nextTick();
};

// Extend from AbstractEventsDispatcher 'bind' and 'trigger' methods
PusherMock.prototype = new AbstractEventsDispatcher;

/* Add some events 
--------------------------------------------*/

PusherMock.events = [
  {
    'event': "commits:commit",
    'data': {
      "repository": "rr10-team-3",
      "author":"author 1",
      "committed":"The committed timestamp",
      "message":"The commit message 1",
      "commitHash":"SHA of the commit22"
    }
  },
  {
    'event': 'irc:message',
    'data': {      
      'message': '1st irc message',
      'user': 'max13'
    }
  }
  // etc
];