单元测试 – Angular服务测试有什么问题？

angular.module('myApp.services',[])
.service('autoCmpltDataSvc',function ($http) {
    var innerMatch = function (data) {
        return $.map(data,function (item) {
            return {
                fullName: item.name + (item.adminName1 ? "," + item.adminName1 : "") + "," + item.countryName,shortName: item.name,itemId: item.geonameId
            };
        });
    };

    this.fetchFromGeonamesDb = function (request,response,matcher) {
        $http({
            method: 'jsonp',url: 'http://ws.geonames.org/searchJSON?callback=JSON_CALLBACK',params: {
                featureClass: "P",style: "full",maxRows: 12,name_startsWith: request.destName
            }
        }).success(function (data,status) {
            console.log(data);
            response($.map(innerMatch(data.geonames),matcher));
        });
    };
});

我正在尝试测试它是否正确形成了输出,因此我模拟了对真实Web服务的调用.
这是我的单元测试.

describe('Services',function () {

    beforeEach(module('myApp.services'));

    describe('autoCompleteService',function () {
        var $httpBackend,svc;
        var results = [];
        var matcher = function (item) {
            return item;
        };
        var response = function (arr) {
            results = arr;
        };

        beforeEach(inject(function ($injector,autoCmpltDataSvc) {
            svc = autoCmpltDataSvc;
            $httpBackend = $injector.get('$httpBackend');
            $httpBackend.whenJSONP(/searchJSON/).
              respond([
              { name: 'City1',adminName1: 'Region1',countryName: 'Country1',geonameId: 1 },{ name: 'City2',countryName: 'Country2',geonameId: 2}]);
        }));

        afterEach(function () {
            $httpBackend.verifyNoOutstandingExpectation();
            $httpBackend.verifyNoOutstandingRequest();
        });

        it('should return values',function () {
            $httpBackend.expectJSONP(/searchJSON/);
            svc.fetchFromGeonamesDb({ 'destName': 'fra' },matcher);
            $httpBackend.flush();
            expect(results.length).toBe(2);
        });
    });
});

但是测试会产生错误.

TypeError: Cannot read property 'length' of undefined
            at Function.v.extend.map (C:/Users/kmukhort/Documents/_files/TMate/A
ngularTest/app/lib/jquery-1.8.3.min.js:2:15334)
            at innerMatch (C:/Users/kmukhort/Documents/_files/TMate/AngularTest/
app/js/services.js:8:18)

我认为模拟响应有问题,因为它似乎没有返回数组.
但我无法理解为什么它不返回数组.

提前致谢！