querystring.js

define([], function () {
	"use strict";

	function parse(querystring) {
		var obj = {};

		if (querystring) {
			var params = querystring.split(/&|\?/);
			for (var i = 0; i < params.length; i++) {
				var param = params[i];
				var paramParts = param.split('=');
				if (paramParts.length == 2) {
					var name = paramParts[0];
					var value = paramParts[1];
					obj[name] = value;
				}
			}
		}
		return obj;
	}

	function format(obj) {
		var count = 0;
		var querystring = '';
		for (var key in obj) {
			if (obj.hasOwnProperty(key)) {
				if (count++) {
					querystring += '&';
				}
				querystring += key + '=' + obj[key].toString();
			}
		}

		return querystring;
	}

	return {
		parse: parse,
		format: format
	};
});

module("querystring");

QUnit.test("Parse should return an object containing all querystring values", function (assert) {
    var input = "?lat=123&lon=456";
    var expected = { lat: "123", lon: "456" };

    var done = assert.async();

    require(["utils/querystring"], function (querystring) {
        var res = querystring.parse(input);

        propEqual(res, expected);

        done();
    });
});

QUnit.test("Parse should return an empty object if querystring is an empty string", function (assert) {
    var input = "";
    var expected = {};

    var done = assert.async();

    require(["utils/querystring"], function (querystring) {
        var res = querystring.parse(input);

        propEqual(res, expected);

        done();
    });
});

QUnit.test("Parse should return an empty object if querystring is null", function (assert) {
    var input = null;
    var expected = {};

    var done = assert.async();

    require(["utils/querystring"], function (querystring) {
        var res = querystring.parse(input);

        propEqual(res, expected);

        done();
    });
});

QUnit.test("Create a querystring of all properies of an object", function (assert) {
    var input = { lat: 123, lon: 456 };
    var expected = 'lat=123&lon=456';

    var done = assert.async();

    require(["utils/querystring"], function (querystring) {
        var res = querystring.format(input);

        equal(res, expected);

        done();
    });
});

QUnit.test("Create a querystring should exclude properties of prototype", function (assert) {
    var proto = { p1: 123 }
    var input = Object.create(proto);
    input.lat = 456;
    var expected = 'lat=456';

    var done = assert.async();

    require(["utils/querystring"], function (querystring) {
        var res = querystring.format(input);

        equal(res, expected);

        done();
    });
});