在带有茉莉花的angularJS内注入服务的测试控制器

我试图了解如何使用jasmine和angularJS测试我的代码.我用控制器和注入服务编写了一个测试项目.现在我想测试控制器并试图模拟注入的服务.但我没有找到一种方法来测试我的控制器“到达”功能.这是我的jsfiddle： http://jsfiddle.net/2fwxS/

controller.js：

angular.module('myApp.controllers',[])
    .controller('MyCtrl',['$scope','MyService',function ($scope,MyService) {
    $scope.User = {};
    $scope.HasUserArrived = false;
    $scope.Arrived = function(firstname,lastname) {
    $scope.HasUserArrived = MyService.Arrive(firstname,lastname);
    return $scope.HasUserArrived;
    }
}]);

services.js：

var myApp = angular.module('myApp.services',[]).
  value('version','0.1');

myApp.factory('MyService',[function () {
    return {
        HasArrived: false,Arrive: function (firstname,lastname) {
            this.HasArrived = false;

            if (firstname && lastname) {
                this.HasArrived = true;
            }

            console.log("User has arrived: " + this.HasArrived);
            return this.HasArrived;
        }
    }
}]);

我发现了一些类似的解释,其中$provide可能是正确的解决方案(How can I write jasmine test for angular controller and service like this?)或createSpy(How do you mock Angular service that is a function?),但我无法理解何时需要$provider.factory或$provider.value或何时应该使用createSpy？

如果有人能帮助我理解差异并在我的jsFiddle(http://jsfiddle.net/2fwxS/)示例中启动并运行已停用的代码,我将不胜感激…

beforeEach(module(function($provide) {
    var service = { 
        Arrive: function (firstname,lastname) {
            if (firstname && lastname) {
                return true;
            }
        }
    };
    $provide.value('MyService',service);
}));

it('checks that Arrived is correctly used',function() {
    // Arrange
    spyOn(service,'Arrive');

    // Act
    scope.Arrived('Franz','Kafka');

    // Assert
    expect(service.Arrive).toHaveBeenCalledWith('Franz','Kafka');
});