You are looking at a very old, but free version of the course. If you are interesed the most recent version, check it out on the Perl Maven site.

6.12. My own test functions

After writing lots of tests, you'll start to re-factor your code and create functions for specific parts of the test:

You will have some code like this:

use Test::More tests => 2;
is(my_test(2, '+', 3), 5);
is(my_test(4, '+', 4), 10);

sub my_test {
   my ($x, $op, $z) = @_;

   # do stuff

   return $result;

If you are interested in on-site trainings by the author, please contact me directly.