File system operation validation at C standard library level

I'm implementing an alternative C standard library with file operation support.

I'm planning to support both:

• file stream API like fopen, fwrite and etc.
• low level file API like open, write and etc.

I'm looking for a test suite which validates my implementation against standard C requirements (example: validates that pread returns zero when the caller requests read beyond the file contents).

I'll be happy for your suggestions.