Fellow Monks!

I have a script in my latest distribution that I am adding unit tests for. I've gone with the simple caller approach:

bin/script:

#!/usr/bin/perl

use 5.010;
use strict;
use warnings;

main(@ARGV) unless caller;

sub main { die 'main() was run' }

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This script exits with no warnings and normal status when require'd via perl -Ibin -e 'require "script";', but die()s as expected when run directly from the commandline.

t/bin/load.t:

#!perl
use 5.010;
use strict;
use lib qw(bin);
use Test::More;
#use Test::Warnings ':all';  # <--

BEGIN {
    eval { require 'script' };
    BAIL_OUT("bin/script did not load: $@") if $@;
}

done_testing;

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When run via make test, I get bin/load.t ........ skipped: (no reason given) and 255 exit status. When run via prove bin/load.t, I get the same:

t/bin/00-run.t (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255

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I don't know why it's failing. Interestingly, it only failed when I started removing extraneous use lines from bin/load.t. Removing Test::Warnings was the one that stopped it from working! If the use Test::Warnings ':all'; line is uncommented, the test script succeeds.

The BEGIN block seemingly makes no difference. The results are the same if the code is run outside of BEGIN { ... }. Also, if I add a die to the top of bin/script it (correctly) fails with the BAIL_OUT() message from bin/load.t.

So the abnormal exit has me confused. Why is it failing, and how do I fix it? I guess the success under Test::Warnings should be a clue, but I would expect the tests to be more sensitive to warnings when Test::Warnings is included (due to the extra test it adds), not less sensitive.

In reply to Unit test of script fails unless Test::Warnings is used?! by wanna_code_perl

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