Unit testing with AJAX

[Colin Clark]

Michelle,

This is a really nifty strategy. Thanks for sharing it with the list.  
One quick comment below...

On 6-Feb-09, at 2:59 PM, Michelle D'Souza wrote:

> I've spent a couple hours today trying to get the table of contents  
> tests passing and now that they are working I thought I'd share what  
> I learned (thanks Antranig). The problem I ran into was that the  
> code I was testing had an AJAX call in it. I needed to run the test  
> after the AJAX call returned. Our general test writing pattern will  
> not work in this case, instead I used our event system to run the  
> test. This is not a perfect solution since the test knows an  
> implementation detail of the code (that there is an AJAX call) but I  
> couldn't think of a better way to write this.

Actually, I don't think this does reveal an implementation detail to  
the test code, or to anyone else for that matter. You've encapsulated  
this into a standard Infusion event ("myEvent"), so the contract is  
clear. The specifics of the AJAX call, however, don't leak out into  
user code. This is a good thing.

Plus, generally users of this code would generally want to know about  
the fact that an AJAX call is being made so that they can use the  
event wisely.

Colin

>
>
> If you are going to use this strategy for code you are testing, it  
> is important to remember that the test itself needs to start inside  
> the event handler. This pattern looks like this:
>
> (function ($) {
>    $(document).ready(function () {
>            var tests = new jqUnit.TestCase("My Tests");
>
>            var myEventHandler = function () {
>                tests.test("My Test", function () {
>                    assertTrue("this is a test", true);
>                });
>            };
>
>            var options = {
>                listeners: {
>                    myEvent: myEventHandler
>                }
>            };
>
>            fluid.myComponent(container, options);
>    });
> })(jQuery);
>
>
>
>
> ------------------------------------------------------
> Michelle D'Souza
> Software Developer, Fluid Project
> Adaptive Technology Resource Centre
> University of Toronto
>
>
>
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---
Colin Clark
Technical Lead, Fluid Project
Adaptive Technology Resource Centre, University of Toronto
http://fluidproject.org