将 $stateParams 和 $state 注入 jasmine angular js 测试变得未定义 [英] Injected $stateParams and $state into jasmine angular js test getting undefined

问题描述

我正在为我的 DetailCtrl 编写一个 jasmine 测试.我有 10 个 json 文件，每个文件名都是这样的

I am writing a jasmine test for my DetailCtrl. I have 10 json file each with file names like this

1.json
2.json
3.json

在我的数据文件夹中

这是我的详细信息 Ctrl

Here is my Detail Ctrl

backpagecontrollers.controller('DetailCtrl', function($scope, $stateParams, $http) {
  $http.get('data/' +  $stateParams.listingId + '.json').success(function(data) {
      $scope.extrainfo = data; 
  });
}); 

细节控制器从我的数据文件夹中获取每个 1.json、2.json、3.json 文件.

The detail controller is fetching each 1.json, 2.json, 3.json file from my data folder.

这是我的路线的一部分

.state('listingdetail', {
      url: "/listings/:listingId",
      templateUrl: "partials/detail.html",
      controller: 'DetailCtrl'
    })

让我们回到测试，我将 $stateParams 和 $state 都注入到测试中.

Lets head back to the test, I injected both the $stateParams and the $state into the test.

我想测试图像上方的每个 json 文件是否存在于我的 json 文件中.我正在设置 httpbackend 以获取本地主机 url 以及来自 $stateparams 的列表 ID，我将其配置为路由的一部分，但 listingId 返回未定义.我应该在我的测试中注入其他东西吗?

I want to test that for each json file above the images exist inside my json file. I am setting the httpbackend to get the local host url plus the listingId from the $stateparams which I configured as part of the routes but the listingId is coming back as undefined. Am I suppose to inject something else into my test?

describe('Detail Ctrl', function() {

      var scope, ctrl, httpBackend, stateparams, listingId; 

      beforeEach(angular.mock.module("backpageApp"));
      beforeEach(angular.mock.inject(function($controller, $rootScope, _$httpBackend_,    $stateParams, $state) {
        httpBackend = _$httpBackend_;
        stateparams = $stateParams; 
        listingId = stateparams.listingId;

        httpBackend.expectGET('http://localhost:8000/#/listings/' + listingId).respond([{id: 1 }, {id: 2}, {id:3}, {id:4}, {id:5}, {id:6}, {id:7}, {id:8}, {id:9}, {id:10}]);
        scope = $rootScope.$new(); 
        ctrl = $controller("DetailCtrl", {$scope:scope}); 
      }));

       it('the images for each listing should exist', function() {
        httpBackend.flush(); 
        expect(scope.images).toBe(true)
      });
    });

我收到此错误

Error: Unexpected request: GET data/undefined.json
    Expected GET http://localhost:8000/#/listings/undefined

推荐答案

我想你可能误解了路由器是如何与控制器一起工作的.当您对控制器进行单元测试时，您不是在执行路由或进入 ui-router 状态.当应用程序正常运行时，这些状态和路由将触发控制器执行.但是在单元测试中，您使用 $controller 显式执行控制器.所以你完全跳过了路由部分.这意味着您需要模拟 ui-router 通常会为您创建的对象 $stateparams.

I think you might be misunderstanding how the router is working with the controller. When you're unit testing a controller, you're not executing a route or entering a ui-router state. Those states and routes are what trigger controllers to be executed when the application is running normally. But in a unit test, you're executing the controller explicitly using $controller. So you're skipping the routing part altogether. Which means you need to mock the object that the ui-router would normally create for you, $stateparams.

describe('Detail Ctrl', function() {

  var scope, ctrl, httpBackend, stateparams, listingId; 

  beforeEach(angular.mock.module("backpageApp"));
  //don't need to inject state or stateparams here
  beforeEach(angular.mock.inject(function($controller, $rootScope, _$httpBackend_) {
    httpBackend = _$httpBackend_;
    stateparams = { listingId: 1 }; //mock your stateparams object with your id

    //you should be expecting the get request url from the controller, not the route
    httpBackend.expectGET('data/' + stateparams.listingId + '.json').respond([{id: 1 }, {id: 2}, {id:3}, {id:4}, {id:5}, {id:6}, {id:7}, {id:8}, {id:9}, {id:10}]);
    scope = $rootScope.$new(); 
    //pass your mock stateparams object to the controller 
    ctrl = $controller("DetailCtrl", {$scope:scope, $stateParams:stateparams}); 
  }));

   it('the images for each listing should exist', function() {
    httpBackend.flush(); 
    //I don't see images set in your controller, but you 
    //could check scope.extrainfo here
    expect(scope.images).toBe(true)
  });
});

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