use strict;
use warnings;
use Test::More tests => 2;

my $file = 'somefile.tmp';
unlink $file;
open my $f, '>', $file; close $f;
chmod 0000, $file;

SKIP: {
 skip "cannot run under root", 2 unless $<;
 ok ! eval { somefunc($file); 1; };
 ok $@ =~ /cannot open file/;
}

unlink $file;