Refs #373 -- Updated TupleIsNull lookup to check if any is NULL rather than all.

Regression in 1eac690d25dd49088256954d4046813daa37dc95.

1 files changed, 21 insertions, 4 deletions

diff --git a/tests/foreign_object/tests.py b/tests/foreign_object/tests.py
index 89ed85b658..e288ecd7d4 100644
--- a/tests/foreign_object/tests.py
+++ b/tests/foreign_object/tests.py
@@ -516,18 +516,35 @@ class MultiColumnFKTests(TestCase):
 
     def test_isnull_lookup(self):
         m1 = Membership.objects.create(
-            membership_country=self.usa, person=self.bob, group_id=None
+            person_id=self.bob.id,
+            membership_country_id=self.usa.id,
+            group_id=None,
         )
         m2 = Membership.objects.create(
-            membership_country=self.usa, person=self.bob, group=self.cia
+            person_id=self.jim.id,
+            membership_country_id=None,
+            group_id=self.cia.id,
+        )
+        m3 = Membership.objects.create(
+            person_id=self.jane.id,
+            membership_country_id=None,
+            group_id=None,
+        )
+        m4 = Membership.objects.create(
+            person_id=self.george.id,
+            membership_country_id=self.soviet_union.id,
+            group_id=self.kgb.id,
         )
+        for member in [m1, m2, m3]:
+            with self.assertRaises(Membership.group.RelatedObjectDoesNotExist):
+                getattr(member, "group")
         self.assertSequenceEqual(
             Membership.objects.filter(group__isnull=True),
-            [m1],
+            [m1, m2, m3],
         )
         self.assertSequenceEqual(
             Membership.objects.filter(group__isnull=False),
-            [m2],
+            [m4],
         )