Flex、Flexunit:如何测试一个事件是否被分派了两次? [英] Flex, Flexunit: How to test that an event is dispatched twice?

问题描述

我正在 Flex 应用程序中测试一些事件调度代码，使用 FlexUnit 的 addAsync 方法来测试事件的调度.到目前为止很好，我可以确保至少触发了一个事件.但是，我想说得更详细一些；我想确保准确地调度了我期望的事件集.是否有一个有用的测试模式(或者，甚至是不同的测试框架——我很灵活！)来完成这个?

I'm testing some event dispatch code in a Flex app, using FlexUnit's addAsync method for testing that events are dispatched. Great so far, I can ensure that at least one event was fired. However, I want to be a bit more detailed; I want to ensure that exactly the set of events I'm expecting are dispatched. Is there a useful test pattern (or, even, different test framework -- I'm flexible!) to accomplish this?

我试过这段代码，但它似乎没有第二次被调用:

I tried this code, but it doesn't seem to get invoked the second time:

protected function expectResultPropertyChange(event: Event, numberOfEvents: int = 1): void {
    trace("Got event " + event + " on " + event.target + " with " + numberOfEvents + " traces left...");
    assertTrue(event.type == ResponseChangedEvent.RESPONSE_CHANGED);
    if (numberOfEvents > 1) {
        event.target.addEventListener(ResponseChangedEvent.RESPONSE_CHANGED, addAsync(expectResultPropertyChange, 1000, numberOfEvents - 1));
    }
}

public function testSomething(): void {
    requiredQuestion.addEventListener(ResponseChangedEvent.RESPONSE_CHANGED, addAsync(expectResultPropertyChange, 1000, 2));
    requiredQuestion.responseSelected("1", true);
    requiredQuestion.responseSelected("2", true);
}

推荐答案

回应评论...

如果事件被分派怎么办直接地?responseSelected 没有在 a 上触发异步事件复合对象，它只是简单地调度RESPONSE_CHANGED 事件本身直接地.我不明白这是怎么回事可以使用您的方法来模拟方法.请注意，我对模拟测试实践，所以我可能缺少一个简单的解决方案在这里.

What if the event is dispatched directly? responseSelected doesn't trigger an asynchronous event on a composite object, it simply dispatched the RESPONSE_CHANGED event itself directly. I'm not seeing how this approach can be mocked using your method. Mind you, I'm fuzzy on the mock testing practice as-is, so I'm probably missing a simple solution here.

...在这种情况下，您不需要使用模拟或 addAsync.像这样的事情会做:

..in that case you don't need to use a mock or addAsync. Something like this will do:

public function testSomething(): void 
{
    var requiredQuestion : RequiredQuestion = new RequiredQuestion();

    var callCount : int = 0;
    requiredQuestion.addEventListener(ResponseChangedEvent.RESPONSE_CHANGED, function(event : ResponseChangedEvent)
    {
        callCount++;
    });

    requiredQuestion.responseSelected("1", true);
    requiredQuestion.responseSelected("2", true);

    assertEquals(2, callCount);
}

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