如何在 AngularJS 中测试 $scope.$on [英] How do I test $scope.$on in AngularJS

问题描述

如何测试广播后是否填充了范围?我在 stackexchange 中搜索并找到了一些 QA，但没有一个回答我的问题.代码工作正常，只是不知道如何测试它.我可以补充一点，我是测试新手，尤其是 Jasmine.

How do I test that the scope is populated after the broadcast? I've searched and found a few QA's here in stackexchange, but none answered my problem. The code is working alright, just don't know how to test it. May I add that I'm a novice to testing, and especially with Jasmine.

所以，这里是代码:

服务 CrappySvc:

Service CrappySvc:

update: function() {
    $rootScope.$broadcast('updatecrappy', Crappy.query());
}   

控制器GetCrappyCtrl:

Controller GetCrappyCtrl:

  $scope.$on('updatecrappy', function(event, crap) {
    $scope.crap = crap;
  });

茉莉花:

beforeEach(inject(function($rootScope, $httpBackend, $controller, Crappy) {
  rootScope = $rootScope;
  scope = $rootScope.$new();
  Crappy = mockCrappy;

      ...
  spyOn(rootScope, '$broadcast');
      ...

  ctrl = $controller('GetCrappyCtrl', {
  $scope : scope,
  Crappy : mockCrappy
});               

}));

it('$scope.$on should have been triggered', function() {          
  rootScope.$broadcast('updatecrappy', [{id : 2, name : 'crappy'}]);
  expect(rootScope.$broadcast).toHaveBeenCalledWith('updscenes', [{id : 2, name : 'crappy'}]);

});

石头

推荐答案

你需要告诉 Jasmine 让 spy 调用实际的 $broadcast 函数

You need to tell Jasmine to let the spy call the actual $broadcast function

spyOn($rootScope, '$broadcast').andCallThrough();

如果你不使用 andCallThrough()，间谍什么也不做.

If you don't use andCallThrough() the spy does nothing.

Jasmine 文档

编辑

对于 Jasmine 2，语法是

With Jasmine 2, the syntax would be

spyOn($rootScope, '$broadcast').and.callThrough();

这篇关于如何在 AngularJS 中测试 $scope.$on的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！