[chef] Is there a low-key test framework?

[Russell Bateman < >]

I've got recipe code that's pure Ruby, assembling information from 
attributes, data bags, etc. that's then consumed by more Cheffy code.

I'm looking for a way to "contribute" the plainer Ruby parts to a script 
that would exercise them.

At present, I simply have those bits copied out into stand-alone scripts 
I can run.

I'm new to Chef and to Ruby. I'm having fun, but I'm getting serious now 
about using the very recipes I've been writing in a genuine production 
environment.

I'd like a suggestion or two pointing me to some simple frameworks, even 
if they tested Chef in addition to mere Ruby code.

Thanks,

Russ