Completing the test for get_union_by_model

Author: Fantomas42

tagging/tests/tests.py

@@ -804,6 +804,12 @@ def test_get_union_by_model(self):
         # Issue 114 - Union with non-existant tags
         parrots = TaggedItem.objects.get_union_by_model(Parrot, [])
         self.assertEqual(len(parrots), 0)
+        parrots = TaggedItem.objects.get_union_by_model(Parrot, ['albert'])
+        self.assertEqual(len(parrots), 0)
+
+        Tag.objects.create(name='titi')
+        parrots = TaggedItem.objects.get_union_by_model(Parrot, ['titi'])
+        self.assertEqual(len(parrots), 0)
 
 
 class TestGetRelatedTaggedItems(TestCase):