#118 Add nicer hook for waiting for AJAX

[Anonymous]

I use WatiN for integration tests on a site that makes use of AJAX using jQuery. I need to be able to easily wait for all AJAX responses to return after, for example, clicking a button.

My current way to do that is to extend IE and override WaitForComplete and eval some javascript so I know whether there are any pending requests:

    class JQueryAwareIE : IE
    {
        public override void WaitForComplete(int waitForCompleteTimeOut)
        {
            base.WaitForComplete(waitForCompleteTimeOut);
            while(AreAjaxRequestsPending())
            {
                Thread.Sleep(50);
            }
            base.WaitForComplete(waitForCompleteTimeOut);
        }

        private bool AreAjaxRequestsPending()
        {
            try
            {
                return Eval("(typeof($) !== 'undefined')?($.active):\"0\"") != "0";
            }
            catch (UnauthorizedAccessException)
            {
                //Javascript is disabled so we know there are no outstanding AJAX requests
                return false;
            }
        }
    }

Yuck!

I notice that there is an IEWaitForComplete class that contains the following code:

        if (ieDocument != null)
        {
            WaitWhileMainDocumentNotAvailable(ieDocument.HtmlDocument);
            WaitWhileDocumentStateNotComplete(ieDocument.HtmlDocument);
            WaitForFramesToComplete(ieDocument.HtmlDocument);
        }

If this code were refactored so that classes containing a 'thing to wait for' used a common interface (and I could inject such a class into an IE instance) then I could make a jQuery 'thing to wait for' and life would be better.