我将如何测试一个$ scope.watch在茉莉花（AngularJS）的变化？ [英] How would I test a $scope.watch (AngularJS) change in Jasmine?

问题描述

我最近刚开始写与AngularJS的东西，我不知道怎么去写一个测试为这个特别的事情。我建立了具有不同状态的帮助请求模式。所以在我的控制，我使用$ scope.request_mode变量。不同的链接激活的帮助请求变量设置为不同的东西。

I've just recently started writing something with AngularJS and I'm not sure how to go about writing a test for this particular thing. I'm building a "Help Request" mode that has different states. So in my controller, I use a $scope.request_mode variable. The different links to activate help requests set that variable to something differently.

然后我的指令里面，我在做一个 $ $范围手表（'request_mode'，函数（）{...}）; 选择性地激活或取消事情请求模式的变化。在code所有的伟大工程，但我遇到的问题是测试。我似乎无法得到茉莉花拿起 $范围。$看，实际上任何火灾时它的变化。

Then inside my directive, I'm doing a $scope.$watch('request_mode', function(){...}); to selectively activate or deactivate things as the request mode changes. The code all works great, but the problem I'm having is with testing. I cannot seem to get Jasmine to pick up the $scope.$watch and actually fire anything when it changes.

我敢肯定有人以前碰到这个，所以任何建议将是非常美联社preciated。

I'm sure someone has run into this before, so any suggestions would be very much appreciated.

推荐答案

在你的单元测试，你需要的手动拨打 $范围。$摘要（）或 $范围。$适用（）引发 $范围。$表（）。

In your unit tests you need to manually call $scope.$digest() or $scope.$apply() to trigger $scope.$watch().

通常在code你就不必这样做，因为像 NG-点击指令不要 $ rootScope。$申请为你在幕后。

Normally in your code you wouldn't have to do this, since directives like ng-click do $rootScope.$apply for you behind the scenes.

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