角度单元测试控制器 - 控制器内的模拟服务

Question

我有以下情况:

controller.js

controller('PublishersCtrl',['$scope','APIService','$timeout', function($scope,APIService,$timeout) {

    APIService.get_publisher_list().then(function(data){

            });
 }));

controllerSpec.js

'use strict';

describe('controllers', function(){
    var scope, ctrl, timeout;
    beforeEach(module('controllers'));
    beforeEach(inject(function($rootScope, $controller) {
        scope = $rootScope.$new(); // this is what you missed out
        timeout = {};
        controller = $controller('PublishersCtrl', {
            $scope: scope,
            APIService: APIService,
            $timeout: timeout
        });
    }));

    it('should have scope variable equals number', function() {
      expect(scope.number).toBe(3);
    });
});

错误:

 TypeError: Object #<Object> has no method 'get_publisher_list'

我也试过这样的东西,它没有用:

describe('controllers', function(){
    var scope, ctrl, timeout,APIService;
    beforeEach(module('controllers'));

    beforeEach(module(function($provide) {
    var service = { 
        get_publisher_list: function () {
           return true;
        }
    };

    $provide.value('APIService', service);
    }));

    beforeEach(inject(function($rootScope, $controller) {
        scope = $rootScope.$new(); 
        timeout = {};
        controller = $controller('PublishersCtrl', {
            $scope: scope,
            APIService: APIService,
            $timeout: timeout
        }
        );
    }));

    it('should have scope variable equals number', function() {
      spyOn(service, 'APIService');
      scope.get_publisher_list();
      expect(scope.number).toBe(3);
    });
});

我怎么解决这个问题？有什么建议？

Answer 1

有两种方式(或更确切地说).

想象一下这种服务(如果它是工厂的话无关紧要):

app.service('foo', function() {
  this.fn = function() {
    return "Foo";
  };
});

有了这个控制器:

app.controller('MainCtrl', function($scope, foo) {
  $scope.bar = foo.fn();
});

一种方法是使用您将使用的方法创建一个对象并监视它们:

foo = {
  fn: function() {}
};

spyOn(foo, 'fn').andReturn("Foo");

然后将其foo作为dep传递给控制器​​.无需注入服务.那可行.

另一种方法是模拟服务并注入模拟的服务:

beforeEach(module('app', function($provide) {
  var foo = {
    fn: function() {}
  };

  spyOn(foo, 'fn').andReturn('Foo');
  $provide.value('foo', foo);
}));

当你注射然后foo注射这个.

在此处查看:http://plnkr.co/edit/WvUIrtqMDvy1nMtCYAfo?p=preview

茉莉花2.0:

对于那些努力使答案有效的人,

从Jasmine 2.0 andReturn()开始and.returnValue()

例如,在上面的plunker的第一次测试中:

describe('controller: MainCtrl', function() {
  var ctrl, foo, $scope;

  beforeEach(module('app'));

  beforeEach(inject(function($rootScope, $controller) {
    foo = {
      fn: function() {}
    };

    spyOn(foo, 'fn').and.returnValue("Foo"); // <----------- HERE

    $scope = $rootScope.$new();

    ctrl = $controller('MainCtrl', {$scope: $scope , foo: foo });
  }));

  it('Should call foo fn', function() {
    expect($scope.bar).toBe('Foo');
  });

});

(来源:Rvandersteen)