单元测试 – 在茉莉花测试中模拟角度

var someVar = angular.element(event.target).scope().field;

我试图通过做嘲笑它

var ngElementFake = function(el) {
                return {
                    scope: function() {
                        return {
                            toggleChildElement: true,field: scope.field
                        }
                    }
                }
            }

spyOn(angular,'element').andCallFake(ngElementFakE);

但是当我在测试中调用该函数时,我得到了响应：

TypeError: 'undefined' is not a function (evaluaTing 'injector.get('$rootElement').off()')
at ../angular-mocks/angular-mocks.js:1819

我究竟做错了什么？

编辑：注射

beforeEach(function() {
        inject(function($rootScope,$controller) {

            scope = $rootScope;

            scope.record = recordData;

            scope.model = 'Hierarchy';

            ctrl = $controller("fngHierarchyChildCtrl",{
                $scope: scope
            });
        });
    });