Currently the GTK's DRT outputs some lines related to accessibility events when accessibilityController.logAccessibilityEvents() is called, what is nice but not enough for the case of the 'property-change' signal :-)
We'd need also that the string associated to the 'detail' were output as well for the 'property-change' signal, so we were able to check when some properties (such as 'accessible-value') changes, hence this bug.
Blocking bug 56655 as we need this feature in DRT to properly test the patch there.
Forgot to mention I was talking AtkObject's 'property-change' signal
Created attachment 86672 [details]
Attached patch proposal
Comment on attachment 86672 [details]
Committed r81810: <http://trac.webkit.org/changeset/81810>