--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/regressiontests/get_or_create_regress/tests.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,53 @@
+from django.test import TestCase
+
+from models import Author, Publisher
+
+
+class GetOrCreateTests(TestCase):
+    def test_related(self):
+        p = Publisher.objects.create(name="Acme Publishing")
+        # Create a book through the publisher.
+        book, created = p.books.get_or_create(name="The Book of Ed & Fred")
+        self.assertTrue(created)
+        # The publisher should have one book.
+        self.assertEqual(p.books.count(), 1)
+
+        # Try get_or_create again, this time nothing should be created.
+        book, created = p.books.get_or_create(name="The Book of Ed & Fred")
+        self.assertFalse(created)
+        # And the publisher should still have one book.
+        self.assertEqual(p.books.count(), 1)
+
+        # Add an author to the book.
+        ed, created = book.authors.get_or_create(name="Ed")
+        self.assertTrue(created)
+        # Book should have one author.
+        self.assertEqual(book.authors.count(), 1)
+
+        # Try get_or_create again, this time nothing should be created.
+        ed, created = book.authors.get_or_create(name="Ed")
+        self.assertFalse(created)
+        # And the book should still have one author.
+        self.assertEqual(book.authors.count(), 1)
+
+        # Add a second author to the book.
+        fred, created = book.authors.get_or_create(name="Fred")
+        self.assertTrue(created)
+
+        # The book should have two authors now.
+        self.assertEqual(book.authors.count(), 2)
+
+        # Create an Author not tied to any books.
+        Author.objects.create(name="Ted")
+
+        # There should be three Authors in total. The book object should have two.
+        self.assertEqual(Author.objects.count(), 3)
+        self.assertEqual(book.authors.count(), 2)
+
+        # Try creating a book through an author.
+        _, created = ed.books.get_or_create(name="Ed's Recipes", publisher=p)
+        self.assertTrue(created)
+
+        # Now Ed has two Books, Fred just one.
+        self.assertEqual(ed.books.count(), 2)
+        self.assertEqual(fred.books.count(), 1)