From 4b324fcb8cade30755b3e2afdc30bc2c66eedae8 Mon Sep 17 00:00:00 2001
From: Jun Komoda <45822440+junkmd@users.noreply.github.com>
Date: Wed, 23 Oct 2024 14:30:46 +0000
Subject: [PATCH] Add a test. Such an implementation is used in `CoClass` of
 `comtypes`.

---
 .../test_ctypes/test_c_simple_type_meta.py    | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/Lib/test/test_ctypes/test_c_simple_type_meta.py b/Lib/test/test_ctypes/test_c_simple_type_meta.py
index 3da701d39432e7..de97ca690f8421 100644
--- a/Lib/test/test_ctypes/test_c_simple_type_meta.py
+++ b/Lib/test/test_ctypes/test_c_simple_type_meta.py
@@ -47,3 +47,32 @@ class _Sub2(_Sub):
         self.assertTrue(issubclass(POINTER(_Sub2), _Sub2))
         self.assertTrue(issubclass(POINTER(_Sub2), POINTER(_Sub)))
         self.assertTrue(issubclass(POINTER(_Sub), POINTER(_CtBase)))
+
+    def test_early_return_in_dunder_new_2(self):
+        # Such an implementation is used in `CoClass` of `comtypes`.
+
+        class _ct_meta(type):
+            def __new__(cls, name, bases, namespace):
+                self = super().__new__(cls, name, bases, namespace)
+                if isinstance(self, _p_meta):
+                    return self
+                p = _p_meta(
+                    f"POINTER({self.__name__})", (self, c_void_p), {}
+                )
+                ctypes._pointer_type_cache[self] = p
+                return self
+
+        class _p_meta(PyCSimpleType, _ct_meta):
+            pass
+
+        class _Core(object):
+            pass
+
+        class _CtBase(_Core, metaclass=_ct_meta):
+            pass
+
+        class _Sub(_CtBase):
+            pass
+
+        self.assertIsInstance(POINTER(_Sub), _p_meta)
+        self.assertTrue(issubclass(POINTER(_Sub), _Sub))