Hello,
NIST in the US has a PKI test plan. When I get a chance, I'll pull it down and look it over.
It includes test files.
Here is the url for the pdf:
http://csrc.nist.gov/pki/testing/PKITS.pdf
Here is main page for the pki test site:
http://csrc.nist.gov/pki/testing/x509paths.html
thanks!
Robert