https://github.com/python/cpython/commit/6c67446a6e73ab0e9a26e4360412cbd2f5550e66
commit: 6c67446a6e73ab0e9a26e4360412cbd2f5550e66
branch: main
author: Jun Komoda <[email protected]>
committer: encukou <[email protected]>
date: 2024-11-01T13:50:02+01:00
summary:
gh-125783: Add more tests to prevent regressions with the combination of ctypes
and metaclasses. (GH-126126)
files:
M Lib/test/test_ctypes/test_c_simple_type_meta.py
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 fa5144a3ca01bb..eb77d6d7782478 100644
--- a/Lib/test/test_ctypes/test_c_simple_type_meta.py
+++ b/Lib/test/test_ctypes/test_c_simple_type_meta.py
@@ -85,3 +85,68 @@ class Sub(CtBase):
self.assertIsInstance(POINTER(Sub), p_meta)
self.assertTrue(issubclass(POINTER(Sub), Sub))
+
+ def test_creating_pointer_in_dunder_init_1(self):
+ class ct_meta(type):
+ def __init__(self, name, bases, namespace):
+ super().__init__(name, bases, namespace)
+
+ # Avoid recursion.
+ # (See test_creating_pointer_in_dunder_new_1)
+ if bases == (c_void_p,):
+ return
+ if issubclass(self, PtrBase):
+ return
+ if bases == (object,):
+ ptr_bases = (self, PtrBase)
+ else:
+ ptr_bases = (self, POINTER(bases[0]))
+ p = p_meta(f"POINTER({self.__name__})", ptr_bases, {})
+ ctypes._pointer_type_cache[self] = p
+
+ class p_meta(PyCSimpleType, ct_meta):
+ pass
+
+ class PtrBase(c_void_p, metaclass=p_meta):
+ pass
+
+ class CtBase(object, metaclass=ct_meta):
+ pass
+
+ class Sub(CtBase):
+ pass
+
+ class Sub2(Sub):
+ pass
+
+ self.assertIsInstance(POINTER(Sub2), p_meta)
+ self.assertTrue(issubclass(POINTER(Sub2), Sub2))
+ self.assertTrue(issubclass(POINTER(Sub2), POINTER(Sub)))
+ self.assertTrue(issubclass(POINTER(Sub), POINTER(CtBase)))
+
+ def test_creating_pointer_in_dunder_init_2(self):
+ class ct_meta(type):
+ def __init__(self, name, bases, namespace):
+ super().__init__(name, bases, namespace)
+
+ # Avoid recursion.
+ # (See test_creating_pointer_in_dunder_new_2)
+ if isinstance(self, p_meta):
+ return
+ p = p_meta(f"POINTER({self.__name__})", (self, c_void_p), {})
+ ctypes._pointer_type_cache[self] = p
+
+ 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))
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