javascript Angular Karma 测试在 $scope.$parent 函数上得到“TypeError: 'undefined' is not a function”
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/18385842/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Angular Karma Test getting "TypeError: 'undefined' is not a function" on a $scope.$parent function
提问by Sartaj
While running grunt teston a Yeoman (1.0RC1) scaffolded Angular (1.0.7) app, I'm getting the following error:
在grunt testYeoman (1.0RC1) 脚手架 Angular (1.0.7) 应用程序上运行时，我收到以下错误：
TypeError: 'undefined' is not a function (evaluating '$scope.$parent.userLoggedIn(true)')
userLoggedIn()is within a parent controller index.js. The function itself runs fine within the angular app.
userLoggedIn()位于父控制器内index.js。该函数本身在 angular 应用程序中运行良好。
This error doesn't occur on my other $scope.$parentboolean or strings variables in the controller, so it's related directly to calling functions within a parent.
此错误不会发生在$scope.$parent控制器中的其他布尔变量或字符串变量上，因此它与在父级中调用函数直接相关。
I'm thinking that I'm either using $scope.$parentthe wrong way or that I need to define my index.jscontroller in the test, but Karma testing documentation is sporadic, so it's hard to know.
我在想我要么使用$scope.$parent了错误的方法，要么我需要index.js在测试中定义我的控制器，但 Karma 测试文档是零星的，所以很难知道。
EDIT: Here is the controller:
编辑：这是控制器：
'use strict';
angular.module('uiApp')
.controller('LookupCtrl', ['$scope', function ($scope) {
$scope.awesomeThings = [
'HTML5 Boilerplate',
'AngularJS',
'Karma'
];
$scope.$parent.userLoggedIn(true);
}]);
Here is the test:
这是测试：
'use strict';
describe('Controller: LookupCtrl', function () {
// load the controller's module
beforeEach(module('uiApp'));
var LookupCtrl,
scope;
// Initialize the controller and a mock scope
beforeEach(inject(function ($controller, $rootScope) {
scope = $rootScope.$new();
LookupCtrl = $controller('LookupCtrl', {
$scope: scope
});
}));
it('should attach a list of awesomeThings to the scope', function () {
expect(scope.awesomeThings.length).toBe(3);
});
});
(Yes I know I'm just using the default awesomeThingstest for now. I'm new to Angular testing).
（是的，我知道我现在只是使用默认awesomeThings测试。我是 Angular 测试的新手）。
采纳答案by Ven
You're giving the controller a rootScope, which doesn't have $parent(it's the root).
Change your controller code to call it correctly (using the prototype chain) and you'll be fine by just passing {my: props}as an object.
你给控制器 a rootScope，它没有$parent（它是根）。更改您的控制器代码以正确调用它（使用原型链），只需{my: props}作为对象传递就可以了。
