def test_format_fs_label(self, _): short_label = 'label' long_label = '0123456789ABCD' long_label_trimmed = long_label[:12] template = ' -L {0} ' self.assertEqual(fu.format_fs_label(None), '') self.assertEqual(fu.format_fs_label(short_label), template.format(short_label)) self.assertEqual(fu.format_fs_label(long_label), template.format(long_label_trimmed))