yes man this is doable, for example:
To test jQuery fade, you must first understand the logic of this method, jQuery fadeOut()change the display of the element todisplay: none;
so that you can get the value of the element displayusing JavascriptExecutor
jQuery before fadeand after, and check if the value displaywas as you expected:
((JavascriptExecutor)driver).executeScript("return $('#yourElementSelector').attr('style')");
note: #yourElementSelector css
Executor var, :