Test Driven Ajax (on Rails)

Conclusion(s)

For the insanely curious, here's the complete block of JavaScript that goes, via javascript:void() and update_iframe(), into the inner Wiki's IFRAME src attribute, reformatted:

function report(diagnostic)
{
  var transcript = window.parent.document.getElementById('transcript');
  transcript.innerHTML += diagnostic;
  onComplete ();
}

function onComplete()
{
  window.parent.location.href =
    'javascript:void(find_faults("TestWiki","//test_WikiTestPage"))';
}

if (!(!/Exception /.test (document.title)))
  report
    ("<span class='fault'>failed: !/Exception/.test(document.title)</span><br/>");

document.getElementById('link_node:test_uncle_wiggily').click ();

{
  var handler = {
    onComplete: function(request)
    {
      if (/^\\/wiki\\/find_faults.*test_uncle_wiggily/.test(request.url))
        {
        Ajax.Responders.unregister(handler);

        if (!($("title_node:test_uncle_wiggily").className == "wiki_red"))
          report( "<span class='fault'>" +
                   "failed: $(&quot;title_node:test_uncle_wiggily&quot;).
className == &quot;wiki_red&quot;" +
                  "</span><br/>" );
        }
      }
    };
  Ajax.Responders.register(handler);
}
onComplete();

When you click the test link on the outer Wiki, all these things happen:

• link_to_remote calls the server, which dispatches to our controller

• Our controller responds with JavaScript

• The JavaScript creates an IFRAME and sets its onload handler

• The load event stuffs more JavaScript into the IFRAME src

• That JavaScript clicks the inner Wiki's test button

• This whole sequence runs again, inside the inner Wiki

• Its test script fails ...