use Test::More tests => 3;
use Test::MockFile::Light module => 'Foo::Bar';

use_ok('Foo::Bar');

my $file_name = 'data.txt';
my $content = join("\n", 1..5);

define_file_mocker($file_name, $content);

can_ok(Foo::Bar, 'process');

is(Foo::Bar->process($file_name), 15, 'unexpected sum');