--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/parts/django/tests/regressiontests/m2m_through_regress/tests.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,128 @@
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from StringIO import StringIO
+
+from django.core import management
+from django.contrib.auth.models import User
+from django.test import TestCase
+
+from models import Person, Group, Membership, UserMembership
+
+
+class M2MThroughTestCase(TestCase):
+    def test_everything(self):
+        bob = Person.objects.create(name="Bob")
+        jim = Person.objects.create(name="Jim")
+
+        rock = Group.objects.create(name="Rock")
+        roll = Group.objects.create(name="Roll")
+
+        frank = User.objects.create_user("frank", "frank@example.com", "password")
+        jane = User.objects.create_user("jane", "jane@example.com", "password")
+
+        Membership.objects.create(person=bob, group=rock)
+        Membership.objects.create(person=bob, group=roll)
+        Membership.objects.create(person=jim, group=rock)
+
+        self.assertQuerysetEqual(
+            bob.group_set.all(), [
+                "<Group: Rock>",
+                "<Group: Roll>",
+            ]
+        )
+
+        self.assertQuerysetEqual(
+            roll.members.all(), [
+                "<Person: Bob>",
+            ]
+        )
+
+        self.assertRaises(AttributeError, setattr, bob, "group_set", [])
+        self.assertRaises(AttributeError, setattr, roll, "members", [])
+
+        self.assertRaises(AttributeError, rock.members.create, name="Anne")
+        self.assertRaises(AttributeError, bob.group_set.create, name="Funk")
+
+        UserMembership.objects.create(user=frank, group=rock)
+        UserMembership.objects.create(user=frank, group=roll)
+        UserMembership.objects.create(user=jane, group=rock)
+
+        self.assertQuerysetEqual(
+            frank.group_set.all(), [
+                "<Group: Rock>",
+                "<Group: Roll>",
+            ]
+        )
+
+        self.assertQuerysetEqual(
+            roll.user_members.all(), [
+                "<User: frank>",
+            ]
+        )
+
+    def test_serialization(self):
+        "m2m-through models aren't serialized as m2m fields. Refs #8134"
+
+        p = Person.objects.create(name="Bob")
+        g = Group.objects.create(name="Roll")
+        m = Membership.objects.create(person=p, group=g)
+
+        pks = {"p_pk": p.pk, "g_pk": g.pk, "m_pk": m.pk}
+
+        out = StringIO()
+        management.call_command("dumpdata", "m2m_through_regress", format="json", stdout=out)
+        self.assertEqual(out.getvalue().strip(), """[{"pk": %(m_pk)s, "model": "m2m_through_regress.membership", "fields": {"person": %(p_pk)s, "price": 100, "group": %(g_pk)s}}, {"pk": %(p_pk)s, "model": "m2m_through_regress.person", "fields": {"name": "Bob"}}, {"pk": %(g_pk)s, "model": "m2m_through_regress.group", "fields": {"name": "Roll"}}]""" % pks)
+
+        out = StringIO()
+        management.call_command("dumpdata", "m2m_through_regress", format="xml",
+            indent=2, stdout=out)
+        self.assertEqual(out.getvalue().strip(), """
+<?xml version="1.0" encoding="utf-8"?>
+<django-objects version="1.0">
+  <object pk="%(m_pk)s" model="m2m_through_regress.membership">
+    <field to="m2m_through_regress.person" name="person" rel="ManyToOneRel">%(p_pk)s</field>
+    <field to="m2m_through_regress.group" name="group" rel="ManyToOneRel">%(g_pk)s</field>
+    <field type="IntegerField" name="price">100</field>
+  </object>
+  <object pk="%(p_pk)s" model="m2m_through_regress.person">
+    <field type="CharField" name="name">Bob</field>
+  </object>
+  <object pk="%(g_pk)s" model="m2m_through_regress.group">
+    <field type="CharField" name="name">Roll</field>
+  </object>
+</django-objects>
+        """.strip() % pks)
+
+    def test_join_trimming(self):
+        "Check that we don't involve too many copies of the intermediate table when doing a join. Refs #8046, #8254"
+        bob  = Person.objects.create(name="Bob")
+        jim = Person.objects.create(name="Jim")
+
+        rock = Group.objects.create(name="Rock")
+        roll = Group.objects.create(name="Roll")
+
+        Membership.objects.create(person=bob, group=rock)
+        Membership.objects.create(person=jim, group=rock, price=50)
+        Membership.objects.create(person=bob, group=roll, price=50)
+
+        self.assertQuerysetEqual(
+            rock.members.filter(membership__price=50), [
+                "<Person: Jim>",
+            ]
+        )
+
+        self.assertQuerysetEqual(
+            bob.group_set.filter(membership__price=50), [
+                "<Group: Roll>",
+            ]
+        )
+
+class ThroughLoadDataTestCase(TestCase):
+    fixtures = ["m2m_through"]
+
+    def test_sequence_creation(self):
+        "Check that sequences on an m2m_through are created for the through model, not a phantom auto-generated m2m table. Refs #11107"
+        out = StringIO()
+        management.call_command("dumpdata", "m2m_through_regress", format="json", stdout=out)
+        self.assertEqual(out.getvalue().strip(), """[{"pk": 1, "model": "m2m_through_regress.usermembership", "fields": {"price": 100, "group": 1, "user": 1}}, {"pk": 1, "model": "m2m_through_regress.person", "fields": {"name": "Guido"}}, {"pk": 1, "model": "m2m_through_regress.group", "fields": {"name": "Python Core Group"}}]""")