from unittest import TestCase

from modeltests.validation import ValidationTestCase

from models import *

class TestModelsWithValidators(ValidationTestCase):

    def test_custom_validator_passes_for_correct_value(self):

        mtv = ModelToValidate(number=10, name='Some Name', f_with_custom_validator=42)

        self.assertEqual(None, mtv.full_clean())

    def test_custom_validator_raises_error_for_incorrect_value(self):

        mtv = ModelToValidate(number=10, name='Some Name', f_with_custom_validator=12)

        self.assertFailsValidation(mtv.full_clean, ['f_with_custom_validator'])

        self.assertFieldFailsValidationWithMessage(

            mtv.full_clean,

            'f_with_custom_validator',

            [u'This is not the answer to life, universe and everything!']

        )