Issue #29377: Add three new wrappers to types.py (Manuel Krebber).

2 files changed, 22 insertions, 0 deletions

diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
index 382ca03e5a..4a9fcba526 100644
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -576,6 +576,24 @@ class TypesTests(unittest.TestCase):
         self.assertGreater(object.__basicsize__, 0)
         self.assertGreater(tuple.__itemsize__, 0)
 
+    def test_slot_wrapper_types(self):
+        self.assertIsInstance(object.__init__, types.SlotWrapperType)
+        self.assertIsInstance(object.__str__, types.SlotWrapperType)
+        self.assertIsInstance(object.__lt__, types.SlotWrapperType)
+        self.assertIsInstance(int.__lt__, types.SlotWrapperType)
+
+    def test_method_wrapper_types(self):
+        self.assertIsInstance(object().__init__, types.MethodWrapperType)
+        self.assertIsInstance(object().__str__, types.MethodWrapperType)
+        self.assertIsInstance(object().__lt__, types.MethodWrapperType)
+        self.assertIsInstance((42).__lt__, types.MethodWrapperType)
+
+    def test_method_descriptor_types(self):
+        self.assertIsInstance(str.join, types.MethodDescriptorType)
+        self.assertIsInstance(list.append, types.MethodDescriptorType)
+        self.assertIsInstance(''.join, types.BuiltinMethodType)
+        self.assertIsInstance([].append, types.BuiltinMethodType)
+
 
 class MappingProxyTests(unittest.TestCase):
     mappingproxy = types.MappingProxyType
diff --git a/Lib/types.py b/Lib/types.py
index d8d84709e1..1b7859e73a 100644
--- a/Lib/types.py
+++ b/Lib/types.py
@@ -36,6 +36,10 @@ MethodType = type(_C()._m)
 BuiltinFunctionType = type(len)
 BuiltinMethodType = type([].append)     # Same as BuiltinFunctionType
 
+SlotWrapperType = type(object.__init__)
+MethodWrapperType = type(object().__str__)
+MethodDescriptorType = type(str.join)
+
 ModuleType = type(sys)
 
 try: