need a technique for supporting asynchronous tests

[paulirish]

data URI is one test where async is required

[peol]

Yeah, I think QUnit would be pretty ace to have here, or implement something like this from scratch that is simple and lightweight (which might be hard).

[phiggins42]

yah, doh has a super lightweight dojo.Deffered version (promises). Something following that simple API would be a win, though adds complexity that anything depending on it couldn't reliably use the test until after the callback. something like has("someaynctest").callback(fnForTrueCase).error(fnForFalseCase); with the ultimate end result being has("someasynctest") will be a new dfd (eg: always async)

or should async tests resolve to truthy values once completed? or, when(has("someasynctest", function(result){ ... }) or should it be a new/extra API (I can't imagine tooooo many fd tests needing to be async)

[jdunck]

Here's another test that would require async support:
http://heydanno.com/blog/2010/03/07/detecting-transition-event-support/