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");

      equals(this.xhr.requests[0].url, "/url", "the requested url is correct");

      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");

    });

    test("test annotation search", function() {

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

      ser._data = { annotations : [

      {"content": {        

        "description": "professeur", 

        "title": "garrigou"

        }},

      { "content": {        

        "description": "interview", 

        "title": "Revue de presse - Herv� Gardette"

      }},

      {"content": {        

        "description": "concept", 

        "title": "id�e"

      }},

      { "content": {        

        "description": "", 

        "title": "sans titre"

      }}

      ]};

      equal(ser.searchAnnotations("GarriGOU", "", "").length, 1, "requesting on title works");

      equal(ser.searchAnnotations("", "IntErView", "").length, 1, "requesting on description works");      

      equal(ser.searchAnnotations("", "", "").length, 4, "empty request works");

      equal(ser.searchAnnotations("id�e", "concept", "").length, 1, "specific request works");

    });

    test("test occurence count", function() {

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

      ser._data = { annotations : [

      {"content": {        

        "description": "professeur", 

        "title": "garrigou"

        }, "id" : 1 },

      { "content": {        

        "description": "interview", 

        "title": "Revue de presse - Herv� Gardette"

      }, "id" : 2},

      {"content": {        

        "description": "concept", 

        "title": "id�e"

      }, "id" : 3},

      { "content": {        

        "description": "", 

        "title": "sans titre"

      }, "id" : 4}

      ]};

      // a function to get the number of fields in a dict.

      function countOccurences(queryString) {

        var count = 0;

        for (var i in ser.searchOccurences(queryString)) {

          count++;

        };

        return count;

      };

      equal(countOccurences("garrigou"), 1, "first request works");

      deepEqual(ser.searchOccurences("garrigou"), {1 : 1}, "returned object is correctly defined");

      equal(countOccurences("garrigou interview"), 2, "second request works");

      equal(countOccurences("garrigou id�e interview"), 3, "third request works");

    });

};