testcases for optional axes?

I'm implementing the "optional axes" (following-sibling:: etc)
of XQuery.  Does anyone have any open-source tests I could use
to verify that I got it right?  I'd like to incorporate the tests
into the Qexo tests framework, so I expect to tweak them a bit.
(Not that it would be very difficult making my own tests, but
it always preferable to use use someone else's.)
-- 
	--Per Bothner
per@bothner.com   http://per.bothner.com/