fixed bower install + unit tests

Author: scottinet

package.json

@@ -39,6 +39,7 @@
     "istanbul": "0.4.0",
     "istanbul-middleware": "0.2.1",
     "mocha": "2.3.3",
+    "proxyquire": "^1.7.3",
     "rewire": "^2.5.0",
     "should": "7.1.1"
   }

src/kuzzle.js

@@ -1,14 +1,7 @@
 var
   uuid = require('node-uuid'),
-  io,
   KuzzleDataCollection = require('./kuzzleDataCollection');
 
-if (window && window.io) {
-  io = window.io;
-} else {
-  io = require('socket.io-client');
-}
-
 /**
  * This is a global callback pattern, called by all asynchronous functions of the Kuzzle object.
  *
@@ -54,6 +47,10 @@ module.exports = Kuzzle = function (url, options, cb) {
         reconnected: []
       }
     },
+    io: {
+      value: null,
+      writable: true
+    },
     queuing: {
       value: false,
       writable: true
@@ -164,6 +161,12 @@ module.exports = Kuzzle = function (url, options, cb) {
     }
   });
 
+  if (typeof window !== 'undefined' && window.io) {
+    this.io = window.io;
+  } else {
+    this.io = require('socket.io-client');
+  }
+
   if (options) {
     Object.keys(options).forEach(function (opt) {
       if (self.hasOwnProperty(opt) && Object.getOwnPropertyDescriptor(self, opt).writable) {
@@ -249,7 +252,7 @@ Kuzzle.prototype.connect = function (cb) {
 
   self.state = 'connecting';
 
-  self.socket = io(self.url, {
+  self.socket = self.io(self.url, {
     reconnection: self.autoReconnect,
     reconnectionDelay: self.reconnectionDelay,
     'force new connection': true