Idea: An acceptance test framework for command line programs

This is an extension of the standard acceptance test framework pattern to the world of command line programs.
If you specify:

• a set of scripts to run, 
• a set of inputs and expected outputs, 

the framework runs them, and prints out the results of running the tests like so:

I have most of the framework working in another project that should be easy to extract out and make into a standalone project