public function test_file_with_strange_characters()
{
file_put_contents(PATH::get_root() . '/Groß.jpg', '');
$this->assertFileExists(PATH::get_root() . '/Groß.jpg');
$this->backup->backup();
$this->assertFileExists($this->backup->get_backup_filepath());
$this->assertArchiveContains($this->backup->get_backup_filepath(), array('Groß.jpg'));
unlink(PATH::get_root() . '/Groß.jpg');
}