Canonical XML Test suite

Is anyone aware of a publicly available test suite for canonical XML? 
I've got an implementation I'd like to test. Note that I am looking 
just for canonical XML, not XML digital signatures. Ideally I'd like 
a collection of original documents and the canonical forms.

I am particularly interested in examples that demonstrate 
canonicalization of data in non-Unicode character sets that must be 
converted into Unicode normalization form C on canonicalization.

-- 

   Elliotte Rusty Harold
   
   Processing XML with Java (Addison-Wesley, 2002)
   http://www.cafeconleche.org/books/xmljava
   http://www.amazon.com/exec/obidos/ISBN%3D0201771861/cafeaulaitA