def test_validation_function(self):
def adult(user):
if user.age < 18:
user.errors.add('age', "must be over 18.")
User.addValidator(adult)
u = User(age=10)
valid = yield u.isValid()
self.assertEqual(valid, False)
yield u.save()
self.assertEqual(len(u.errors), 1)
self.assertEqual(len(u.errors.errorsFor('age')), 1)
self.assertEqual(len(u.errors.errorsFor('first_name')), 0)
User.clearValidations()
u = User(age=10)
valid = yield u.isValid()
self.assertEqual(valid, True)
User.clearValidations()
