function test_dataloader() {

  module("Dataloader", { setup: function() {                                     

                                      IriSP.jQuery = jQuery;

                                }

    });  

  test("should initialize dataloader", function() {

    var dt = new IriSP.DataLoader();    

    deepEqual(dt._cache, {}, "_cache empty");

  });

  test("should get an outside ressource", function() {

    var response_array = [{ id: 12, text: "Hey there" }];

    var response_string = JSON.stringify(response_array);

    var xhr = this.sandbox.useFakeXMLHttpRequest();

    var requests = this.requests = [];

    xhr.onCreate = function (request) {

        requests.push(request);

    };

    var spy_callback = this.spy();

    var dt = new IriSP.DataLoader();

    var resp = dt.get("/url&a=1", spy_callback);

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

    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 string");

    deepEqual(dt._cache["/url"], response_array, "the response should be stored in the cache");

    var resp2 = dt.get("/url&a=2", spy_callback);

    ok(spy_callback.calledTwice && xhr.requests.length === 1, "callback called twice but request made only once.");

  });

  test("should default to JSONP for foreign domains", function() {

    /* we can't simulate jsonp so we just verify that the function is called */

    var stub = this.stub(IriSP.jQuery, "ajax");

    var dt = new IriSP.DataLoader();

    var resp = dt.get("http://example.com/url&a=1", stub);

    ok(stub.calledOnce, "ajax request actually made");

  });

}