#!/usr/bin/perl -w
my $file = __FILE__;
open my $fh, '<', $file or die "Can't open $file: $!";
<$fh>;
(my $test_file = $file) =~ s/-open-line//;
unless (my $return = do $test_file) {
    warn "couldn't parse $test_file: $@" if $@;
    warn "couldn't do $test_file: $!"    unless defined $return;
    warn "couldn't run $test_file"       unless $return;
}