'SlugField with allow_unicode=True honors max_length.'

def test_slugfield_unicode_max_length(self):

    bs = UnicodeSlugField.objects.create(s=('\xe4\xbd\xa0\xe5\xa5\xbd\xe4\xbd\xa0\xe5\xa5\xbd' * 50))
    bs = UnicodeSlugField.objects.get(pk=bs.pk)
    self.assertEqual(bs.s, ('\xe4\xbd\xa0\xe5\xa5\xbd\xe4\xbd\xa0\xe5\xa5\xbd' * 50))
