question on rpg testing

Hi all,

I'm interested in how people are going about their tests!

I'm creating a test library libA for pgmA.

PgmA will do a load of stuff then call other programs that will write
to files, return, then pgmA will write just one or two files, all of
which wil be in libA. All the called programs have their own test
libraries.

Should one set up the library to only control the contents of the
files written by PGMA or whole chain of files? It seems to me that the
latter would make the library difficult to maintain if one of the
called programs get modified.