create code tests

[lilypond]

Hello,

Currently I am writing code for musicxml output for lilypond.
As a part of this process I want to create code tests
For me it is possible to check a lot of code by first running a guile
command, and then a python script.
Another part of the tests can be done by running lilypond on a file, and
then run a python script.

Is het possible to do this kind of tests in the current lilypond regression
test environment?

Jaap de Wolff