You may try yaffs2/direct/dtest.c or yaffs2/direct/fsx_test/yaffs_fsx.c :)

They are used in Yaffs Direct Interface, and in file emulation mode.
But I think it's easy to use them in a linux module way.

jaikumar Ganesh wrote:
> Hi folks
>  I am new to the Yaffs2 file system and have just ported it to my environment.
> Are there a set of test cases say for performance and for validity of
> the system that I could download and probably tweak for a quick sanity
> check ?
>
> Thanks
> Jaikumar
>
>