/tests/modeltests/field_defaults/tests.py

from datetime import datetime

from django.test import TestCase

from models import Article


class DefaultTests(TestCase):
    def test_field_defaults(self):
        a = Article()
        now = datetime.now()
        a.save()

        self.assertTrue(isinstance(a.id, (int, long)))
        self.assertEqual(a.headline, "Default headline")
        self.assertTrue((now - a.pub_date).seconds < 5)