apache-flex - 柔性，柔性单元 : How to test that an event is dispatched twice?

Question

我正在 Flex 应用程序中测试一些事件分派(dispatch)代码，使用 FlexUnit 的 addAsync 方法测试事件是否已分派(dispatch)。到目前为止很棒，我可以确保至少触发了一个事件。但是，我想更详细一点；我想确保准确地派发我期望的事件集。是否有有用的测试模式(或者，甚至不同的测试框架——我很灵活!)来完成这个？

我试过这段代码，但它似乎没有被第二次调用:

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);
}

Answer 1

回应评论...

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:

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);
}