fix calling the classmethod descriptor directly (closes #14699)

1 files changed, 16 insertions, 0 deletions

diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index 2289f6e..cdaf7d2 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -1458,6 +1458,22 @@ order (MRO) for bases """
         self.assertEqual(x, spam.spamlist)
         self.assertEqual(a, a1)
         self.assertEqual(d, d1)
+        spam_cm = spam.spamlist.__dict__['classmeth']
+        x2, a2, d2 = spam_cm(spam.spamlist, *a, **d)
+        self.assertEqual(x2, spam.spamlist)
+        self.assertEqual(a2, a1)
+        self.assertEqual(d2, d1)
+        class SubSpam(spam.spamlist): pass
+        x2, a2, d2 = spam_cm(SubSpam, *a, **d)
+        self.assertEqual(x2, SubSpam)
+        self.assertEqual(a2, a1)
+        self.assertEqual(d2, d1)
+        with self.assertRaises(TypeError):
+            spam_cm()
+        with self.assertRaises(TypeError):
+            spam_cm(spam.spamlist())
+        with self.assertRaises(TypeError):
+            spam_cm(list)
 
     def test_staticmethods(self):
         # Testing static methods...