function test_JSONSerializer() {

  module("JSON Serializer tests", 

    { setup: function() {      

      this.dt = new IriSP.DataLoader();

      }

    }

    );    

    test("should return the correct JSON", function() {

      var arr = ["ab", {"de" : "fg"}, "lp"];

      var serializer = new IriSP.JSONSerializer(this.dt);

      equal(serializer.serialize(arr), JSON.stringify(arr), "assert that the outputted json is correct");

    });

    test("sync()", function() {

      this.xhr = this.sandbox.useFakeXMLHttpRequest();

      this.requests = [];

      this.xhr.onCreate = function (request) {

        this.requests.push(request);

      };

      var response_array = { media: 12, content: "Hey there", 

                             annotations: [{"begin": "32", "end" : 64}, {"begin": "08", "end" : 27},{"begin": "02", "end" : 61}]  };

      /* sorted array is our comparision array */

      var sorted_array = IriSP.jQuery.extend({}, response_array);

      sorted_array.annotations.sort(function(a, b) 

          { var a_begin = +a.begin;

            var b_begin = +b.begin;

            return a_begin - b_begin;

          });

      var response_string = JSON.stringify(response_array);

      var spy_callback = this.spy();

      var ser = new IriSP.JSONSerializer(this.dt, "/url");

      ser.sync(spy_callback);

      equals(this.xhr.requests.length, 1, "the mock ajax object should have received the request");

      this.xhr.requests[0].respond(200, { "Content-Type": "application/json" },

                             response_string);

      ok(spy_callback.calledOnce, "callback called");

      ok(spy_callback.calledWith(response_array), "callback called with correct value");

      deepEqual(ser._data, response_array, "the internal variable is initialized to the correct value");

      var order_preserved = true;

      var i = 0;

      for(i = 0; i < ser._data.length - 1; i++) {

        if (ser._data.annotations[i].begin > ser._data.annotations[i+1].begin) {

            order_preserved = false;

            break;

        }

      }

      ok(order_preserved, "the annotation sub-array is sorted by begin time");

    });

    test("currentMedia should return the current media", function() {

      var ser = new IriSP.JSONSerializer(this.dt, "/url");

      ser._data = {}

      ser._data.medias = [0];

      equal(ser.currentMedia(), 0, "currentMedia() returns the correct value");

};