it("is checking compatibility correctly when window.XMLHttpRequest is absent", function (){

            window.XMLHttpRequest = null;

            expect(XmlHttpRequestConnection.isCompatible()).toEqual(false);

        });
        it("is checking compatibility correctly when window.XMLHttpRequest is present", function (){

            window.XMLHttpRequest = {};

            expect(XmlHttpRequestConnection.isCompatible()).toEqual(true);

        });