def test_validation(self):
User.validatesPresenceOf('first_name', message='cannot be blank, fool.')
User.validatesLengthOf('last_name', range=xrange(1, 101))
User.validatesUniquenessOf('first_name')
u = User()
yield u.validate()
self.assertEqual(len(u.errors), 2)
first = yield User(first_name="not unique", last_name="not unique").save()
u = yield User(first_name="not unique", last_name="not unique").save()
self.assertEqual(len(u.errors), 1)
self.assertEqual(u.id, None)
# make sure first can be updated
yield first.save()
self.assertEqual(len(first.errors), 0)
User.clearValidations()
