def _pre_save_clone(self, source):
max_length = self._meta.get_field('title').max_length
self.title = truncate_str(source.title, max_length,
suffix=u' ({} {:08x})'.format(ugettext(u'Copy'),
randint(0, MAXINT),
),
)
# TODO: atomic
while Folder.objects.filter(title=self.title).exists():
self._pre_save_clone(source)
def test_truncate_str_01(self):
s = string.ascii_letters
self.assertEqual(52, len(s))
truncated = truncate_str(s, 50)
self.assertEqual(50, len(truncated))
self.assertEqual(s[:-2], truncated)
expected = s[:-5] + '012'
self.assertEqual(expected, truncate_str(s, 50, suffix='012'))
self.assertEqual('', truncate_str('', 0, suffix='01234'))
self.assertEqual('01234', truncate_str('abcdef', 5, suffix='01234'))
self.assertEqual('abc', truncate_str('abcdef', 3, suffix=''))
self.assertEqual('', truncate_str('abcdef', -1, suffix=''))
self.assertEqual('', truncate_str('abcdef', -1, suffix='aaaaaa'))
self.assertEqual('a', truncate_str('b', 1, suffix='a'))
self.assertEqual('abcd', truncate_str('abcdef', 4, suffix='01234'))