無法獲得承諾角度服務的結果

Question

我試圖嘲笑我正在使用的服務，應該返回一個承諾，模擬服務正在被調用，但我無法得到我的測試結果。被測試

服務功能：

function getDevices() { 
      console.log('getDevices'); 
      return servicesUtils.doGetByDefaultTimeInterval('devices') 
       .then(getDevicesComplete); 

      function getDevicesComplete(data) { 
       console.log('getDevicesComplete'); 
       var devices = data.data.result; 
       return devices; 
      } 
     } 

我的測試是：

describe('devicesService tests', function() { 
    var devicesService; 
    var servicesUtils, $q, $rootScope; 

    beforeEach(function() { 
     servicesUtils = {}; 

     module('app.core', function ($provide) { 
      servicesUtils = specHelper.mockServiceUtils($provide, $q, $rootScope); 
     }); 

     inject(function (_devicesService_, _$q_, _$rootScope_) { 
      devicesService = _devicesService_; 
      $q = _$q_; 
      $rootScope = _$rootScope_.$new(); 
     }); 
    }); 

    it('getting device list', function() { 
     console.log('getting device list'); 
     devicesService.getDevices().then(function (result) { 
      console.log(result); 
      expect(result).toBeDefined(); 
     });  
    }); 
}); 

模擬文件：

function mockServiceUtils($provide, $q) { 
     var servicesUtils = {}; 
     servicesUtils.doGetByDefaultTimeInterval = jasmine.createSpy().and.callFake(function() { 
      var deferred = $q.defer(); 
      deferred.resolve('Remote call result'); 
      $rootScope.$digest(); 
      return deferred.promise; 
     }); 

     $provide.value('servicesUtils', servicesUtils); 

     return servicesUtils; 
    } 

Answer 1

你的代碼是太複雜。

假設您要測試使用另一個服務servicesUtils的服務devicesService，該服務具有返回承諾的方法。 讓我們假設devicesService的責任是呼籲servicesUtils並改變其結果。

這是我會怎麼做：

describe('devicesService', function() { 

    var devicesService, servicesUtils; 

    beforeEach(module('app.core')); 
    beforeEach(inject(function(_devicesService_, _servicesUtils_) { 
    devicesService = _devicesService_; 
    servicesUtils = _servicesUtils_; 
    })); 

    it('should get devices', inject(function($q, $rootScope) { 
    spyOn(servicesUtils, 'doGetByDefaultTimeInterval').and.returnValue($q.when('Remote call result')); 

    var actualResult; 
    devicesService.getDevices().then(function(result) { 
     actualResult = result; 
    }); 
    $rootScope.$apply(); 

    expect(actualResult).toEqual('The transformed Remote call result'); 
    })); 
});