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copied!<p>As I see from your example, </p> <ul> <li>you didn't define properly the <code>factory.</code> The <code>this</code> key used for <code>service</code></li> <li>in <code>testService.doLoadItems(callback);</code> replace with <code>testServiceMockConfig.doLoadItems(callback);</code></li> </ul> <p>The difference between <strong>service</strong> - <strong>factory</strong> - <strong>provider</strong> and definition you can find in this simple demo:</p> <p><kbd><a href="http://jsfiddle.net/pkozlowski_opensource/PxdSP/14/" rel="nofollow">Fiddle</a></kbd></p> <p><em>Fixed example:</em></p> <pre><code>angular.module('testServiceMockConfig', []) .factory('testServiceMockConfig', function () { console.log("setup cqrs mock config."); return{ doLoadItems : function (callback) { console.log("mock loading data"); if (!this.configuredLoadItems) { throw Error("The mock is not configured to loadItems()."); } callback(this.loadItemsError, this.loadItemsSuccess); }, whenLoadItems : function (success, error) { this.configuredLoadItems = true; this.loadItemsSuccess = success; this.loadItemsError = error; } } }); angular.module('testService', ['testServiceMockConfig']) .factory('testService', ['testServiceMockConfig', function (testServiceMockConfig) { console.log("mock version. testServiceMockConfig: "); return { loadItems : function (callback) { testServiceMockConfig.doLoadItems(callback); } } }]) angular.module('ItemApp', ['testService']) .controller('ItemsCtrl', ['$scope', 'testService', function ($scope, testService) { $scope.text = 'No items loaded'; testService.loadItems(function (error, items) { if (error) { $scope.text = "Error happened"; } $scope.text = ''; for (i = 0; i < items.length; i++) { $scope.text = $scope.text + items[i].name; } }) }]); </code></pre> <p>Demo <kbd><a href="http://plnkr.co/edit/xf0zyj2ZOhCiDndbfF08?p=preview" rel="nofollow">Plunker</a></kbd></p>

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