diff options
| -rw-r--r-- | Lib/test/test_ctypes/test_c_simple_type_meta.py | 65 |
1 files changed, 65 insertions, 0 deletions
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 fa5144a..eb77d6d 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 PyCSimpleTypeAsMetaclassTest(unittest.TestCase): 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)) |