Suor#407 failing test to demonstrate a bug

tumb1er · Aug 16, 2021 · 8424c10 · 8424c10
1 parent e2f60db
commit 8424c10
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/tests/tests.py b/tests/tests.py
@@ -660,6 +660,21 @@ def test_387(self):
         post = Post.objects.defer("visible").last()
         post.delete()
 
+    def test_407(self):
+        brand = Brand.objects.create()
+        pk = brand.pk
+        label = Label.objects.create()
+        brand.labels.set([label])
+        # Caching
+        assert len(list(brand.labels.cache()._clone())) == 1
+
+        brand.delete()
+        # Invalidation expected after deletionn
+        brand = Brand.objects.create(pk=pk)
+
+        with self.assertNumQueries(1):
+            self.assertEqual(len(list(brand.labels.cache()._clone())), 0)
+
 
 class RelatedTests(BaseTestCase):
     fixtures = ['basic']