如何测试在角事件？ [英] How can I test events in angular?

问题描述

我需要测试的事件得到正确排放或广播，手动触发事件。

I need to test that events get correctly emitted or broadcasted, and trigger events manually.

什么是做到这一点的最好方法是什么？

What's the best way to do this?

推荐答案

如果你只是需要对事件触发一些测试和追赶，这是我要做的事。为了确保某个事件被解雇（ $发出 -ed或 $广播 -ed），间谍是路要走。您需要将调用 $发出或 $广播，然后只是做一些事情的范围参考像这样的：

If you're just needing some testing on event firing and catching, this is how I do it. For ensuring that a certain event gets fired ($emit-ed or $broadcast-ed), a spy is the way to go. You need a reference to the scope that will be calling the $emit or $broadcast, and then just to do something like this:

spyOn(scope, "$emit")
//run code to test
expect(scope.$emit).toHaveBeenCalledWith("MY_EVENT_ID", other, possible, args);

如果您不需要或不想要担心与传递的参数的 $发出，你可以把一个 $关于在 $ rootScope ，并设置一个标志，知道事件发出。事情是这样的：

If you don't need or don't want to worry about the arguments that are passed with the $emit, you can put an $on on the $rootScope and set a flag to know the event was emitted. Something like this:

var eventEmitted = false;
$rootScope.$on("MY_EVENT_ID", function() {
   eventEmitted = true;
});
//run code to test
expect(eventEmitted).toBe(true);

有关，当一个事件被捕获运行（ $关于），这是一个更容易一些测试功能。刚刚得到一个 $ rootScope 从注函数，然后发送所需的事件。

For testing functionality that runs when an event is caught ($on), it's a little easier. Just get a $rootScope from the inject function and then send the desired event.

$rootScope.$broadcast("EVENT_TO_TEST", other, possible, args);
//expects for event here

现在，我想这个事件的处理将在指令或控制器（或两者）是发生有关设置指令测试，看<一个href=\"https://github.com/vojtajina/ng-directive-testing\">https://github.com/vojtajina/ng-directive-testing.有关设置控制器测试，看<一个href=\"https://github.com/angular/angular-phonecat/blob/master/test/unit/controllersSpec.js#L27\">https://github.com/angular/angular-phonecat/blob/master/test/unit/controllersSpec.js#L27

Now, I imagine this event handling would be happening in a directive or a controller (or both) For setting up directive tests, see https://github.com/vojtajina/ng-directive-testing. For setting up controller tests, see https://github.com/angular/angular-phonecat/blob/master/test/unit/controllersSpec.js#L27

希望这有助于。

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