2017-01-20 137 views
1

我想單元測試一個角度組件與Karma茉莉花第一次。角度指令隔離作用域單元測試失敗

index.html樣子:

<body ng-app="heroApp"> 
    <!-- components match only elements --> 
<div ng-controller="MainCtrl as ctrl"> 
    <b>Hero</b><br> 
    <hero-detail hero="ctrl.hero"></hero-detail> 
</div> 
</body> 
</html> 

而且index.js樣子:

(function(angular) { 
    'use strict'; 
    angular.module('heroApp', []).controller('MainCtrl', function MainCtrl() { 
     this.hero = { 
      name: 'Miles Bronson' 
     }; 
    }); 
})(window.angular); 

而且組件heroDetail.js的樣子:

(function(angular){ 
    'use strict'; 

    function HeroDetailController(){ 

    } 

    angular.module('heroApp').component('heroDetail',{ 
     template:'<span>Name: {{$ctrl.hero.name}}</span>', 
     controller:HeroDetailController, 
     bindings:{ 
      hero: '=' 
     } 
    }); 

})(window.angular); 

現在我的人緣規範文件的樣子就像:

describe('Component:heroDetailComponent',function(){ 
    beforeEach(function(){ 
     module('heroApp'); 
    }); 

    var element, 
     scope; 
    beforeEach(inject(function($rootScope,$compile){ 
     scope = $rootScope.$new(); 
     scope.hero = { 
      name:'Miles Bronson' 
     }; 
     element = angular.element('<hero-detail hero="hero"></hero-detail>'); 
     element = $compile(element)(scope); 
     scope.$apply(); 
    })); 

    it('should render the text',function(){ 
     expect(element.isolateScope().hero.name).toBe('Miles Bronson'); 

    }); 

}); 

但這失敗Saying :

Chrome 55.0.2883 (Windows 8.1 0.0.0) Component:heroDetailComponent should render the text FAILED 
     TypeError: Cannot read property 'name' of undefined 
      at Object.<anonymous> (test/controllers/main-controller-spec.js:38:43) 
Chrome 55.0.2883 (Windows 8.1 0.0.0): Executed 2 of 2 (1 FAILED) (0 secs/0.047Chrome 55.0.2883 (Windows 8.1 0.0.0): Executed 2 of 2 (1 FAILED) (0.763 secs/0.047 secs) 

我在做什麼錯?請幫忙。

UPDATE

Though this works

it('should render the text',function(){ 
    var span = element.find('span'); 
    expect(span.text()).toBe('Name: Miles Bronson'); 

}); 

回答

2

你只是缺少控制器參考。它應該是:

element.isolateScope().$ctrl.hero.name 

見更新plnkr:https://plnkr.co/edit/9ZLzr4AWtCB0q43vBAdf

+0

救主。你是男人。但只是一個愚蠢的問題。在描述塊中沒有引用'$ ctrl'。那麼它在哪裏得到參考?它不應該只與'hero.name'一起工作,因爲那是該塊中唯一的東西? – StrugglingCoder

+0

好吧,我猜如果你的'hero-detail'是一個純粹的指令,但它是一個帶有控制器的組件。所以數據存儲在控制器名稱空間中看起來很合理。但是我沒有太多關於角度組件的經驗,所以我不能真正知道他們是如何深入研究的 –