如何測試依賴於以前測試通過的AngularJS服務？

Question

我有一個AngularJS 1.5.9服務通過測試，我想測試另一個函數調用相同的服務，在一個單獨的它（）。問題是第二個服務函數的結果取決於第一個服務調用的傳遞結果;當服務被重新實例化時，第一個測試的成功結果就會失效。

我的問題是根據this question's答案。

我覺得我想要做的就是這樣的事情，其中​​在第一次測試測試用的服務功能在第二次測試正常使用：

describe('user-service', function() { 
    var $httpBackend, $q, $rootScope; 
    var mockUserData = { "d": { "firstName": "Matt", "lastName": "Lenny" }; 
    var mockCatalogueData = { "d": { "title": "A Feast of Crows" }; 

    beforeEach(module('users')); 

    beforeEach(inject(function (_$httpBackend_,_$q_,_$rootScope_) { 
     $httpBackend = _$httpBackend_; 
     $q = _$q_; 
     $rootScope = _$rootScope_; 

     $httpBackend.when('GET', /(.*)\/user\/api/).respond(200, mockUserData); 
     $httpBackend.when('GET', /(.*)\/cat\/api/).respond(200, mockCatalogueData); 
    })); 

    it('should return the user object', inject(function (userService) { 
     var user; 

     var deferred = $q.defer(); 
     var promise = deferred.promise; 

     promise.then(function (response) { 
      user = response; 
     }); 

     userService.getUserInfo().then(function (response) { 
      deferred.resolve(response); 
     }); 

     $rootScope.$digest(); 

     $httpBackend.flush(); 

     expect(user).toEqual(mockUserData.d); 
    })); 

    it('should return the catalogue object', inject(function (userService) { 
     var catalogue; 

     var deferred = $q.defer(); 
     var promise = deferred.promise; 

     promise.then(function (response) { 
      catalogue = response; 
     }); 

     userService.getUserInfo(); // populates internal userService data 

     userService.getCatalogueInfo().then(function (response) { 
      deferred.resolve(response); 
     }); 

     $rootScope.$digest(); 

     $httpBackend.flush(); 

     expect(user).toEqual(mockCatalogueData.d); 
    })); 
}); 

Answer 1

我發現這工作，但我米不完全確定它是否是正確和適當的方式來執行測試：

describe('user-service', function() { 
    var $httpBackend, $q, $rootScope; 
    var mockUserData = { "d": { "firstName": "Matt", "lastName": "Lenny" }; 
    var mockCatalogueData = { "d": { "title": "A Feast of Crows" }; 

    beforeEach(module('users')); 

    beforeEach(inject(function (_$httpBackend_,_$q_,_$rootScope_) { 
     $httpBackend = _$httpBackend_; 
     $q = _$q_; 
     $rootScope = _$rootScope_; 

     $httpBackend.when('GET', /(.*)\/user\/api/).respond(200, mockUserData); 
     $httpBackend.when('GET', /(.*)\/cat\/api/).respond(200, mockCatalogueData); 
    })); 

    it('should return the user object', inject(function (userService) { 
     var user; 

     var deferred = $q.defer(); 
     var promise = deferred.promise; 

     promise.then(function (response) { 
      user = response; 
     }); 

     userService.getUserInfo().then(function (response) { 
      deferred.resolve(response); 
     }); 

     $rootScope.$digest(); 

     $httpBackend.flush(); 

     expect(user).toEqual(mockUserData.d); 
    })); 

    it('should return the catalogue object', inject(function (userService) { 
     var catalogue; 

     var deferred = $q.defer(); 
     var promise = deferred.promise; 

     userService.getUserInfo().then(function() { // populates internal userService data 
      promise.then(function (response) { 
       catalogue = response; 
      }); 

      userService.getCatalogueInfo().then(function (response) { 
       deferred.resolve(response); 
      }); 
     }); 


     $rootScope.$digest(); 

     $httpBackend.flush(); 

     expect(user).toEqual(mockCatalogueData.d); 
    })); 
});