in reply to Mocking system() call in Unit Test File for a Perl Module

You can hide the built-in system and use a user defined one like so: 

use subs 'system';

*main::system = sub { 0 };

[download]

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In Section Seekers of Perl Wisdom