query string uitl

    /**
    * Parse query string into an object.
    *
    * @method queryStringToObject
    * @param {String} str Query string. Use the query string from URL if this parameter is not provided.
    * @return {Object} Returns the object created from query string
    */
    queryStringToObject: function (str) {
        var i, pair;
        var result = {};
        var params = [];
        str = str|| document.location.search;
        str = str.replace(/(^\?)/,''); //remove '?' at the start
        params = str.split("&");
        for(i=0; i<params.length; i++) {
            pair = params[i].split('=');
            result[pair[0]] = pair[1];
        }
        return result;
    },

    objectToQueryString: function (obj) {
        var params=[];
        for (var k in obj) {
            if (obj.hasOwnProperty(k)) {
                params.push(k+'='+obj[k]);
            }
        }
        return params.join('&');
    }

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        describe.only("queryStringToObject() function", function() {
        it("should parse the string and return an object", function() {
            var querystring = '?a=1&b=2';
            var obj = VHS.util.queryStringToObject(querystring);
            expect(obj.a).to.equal('1');
            expect(obj.b).to.equal('2');
        });

        it("should get queryString from URL if not provided as an argument", function() {
            var seachBackup =  window.location.search;
            window.location.search = '?a=1&b=2';
            console.log(window.location.search);
            var obj = VHS.util.queryStringToObject();
            expect(obj.a).to.equal('1');
            expect(obj.b).to.equal('2');

            window.location.search = seachBackup;
        });

    });

    describe("objectToQueryString() function", function() {
        it("should iterate through the object and return corresponding string", function() {
            var obj = {
                a: 1,
                b: 2
            }
            var str = VHS.util.objectToQueryString(obj);
            expect(str).to.satisfy(function(str) { return str === 'b=2&a=1' || str === 'a=1&b=2'});
        });
    });