Migrated reverse_single_related doctests. Thanks to Stephan Jaekel.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@13926 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/reverse_single_related/tests.py

@@ -0,0 +1,36 @@
+from django.test import TestCase
+
+from regressiontests.reverse_single_related.models import *
+
+class ReverseSingleRelatedTests(TestCase):
+    """
+    Regression tests for an object that cannot access a single related
+    object due to a restrictive default manager.
+    """
+
+    def test_reverse_single_related(self):
+
+        public_source = Source.objects.create(is_public=True)
+        public_item = Item.objects.create(source=public_source)
+
+        private_source = Source.objects.create(is_public=False)
+        private_item = Item.objects.create(source=private_source)
+
+        # Only one source is available via all() due to the custom default manager.
+        self.assertQuerysetEqual(
+                Source.objects.all(),
+                ["<Source: Source object>"]
+        )
+
+        self.assertEquals(public_item.source, public_source)
+
+        # Make sure that an item can still access its related source even if the default
+        # manager doesn't normally allow it.
+        self.assertEquals(private_item.source, private_source)
+
+        # If the manager is marked "use_for_related_fields", it'll get used instead
+        # of the "bare" queryset. Usually you'd define this as a property on the class,
+        # but this approximates that in a way that's easier in tests.
+        Source.objects.use_for_related_fields = True
+        private_item = Item.objects.get(pk=private_item.pk)
+        self.assertRaises(Source.DoesNotExist, lambda: private_item.source)