bpo-36922: implement PEP-590 Py_TPFLAGS_METHOD_DESCRIPTOR (GH-13338)
Co-authored-by: Mark Shannon <mark@hotpy.org>
diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index a062a65..f3d41a2 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -27,6 +27,8 @@
# Were we compiled --with-pydebug or with #define Py_DEBUG?
Py_DEBUG = hasattr(sys, 'gettotalrefcount')
+Py_TPFLAGS_METHOD_DESCRIPTOR = 1 << 17
+
def testfunction(self):
"""some doc"""
@@ -456,6 +458,28 @@
self.pendingcalls_wait(l, n)
+class TestPEP590(unittest.TestCase):
+
+ def test_method_descriptor_flag(self):
+ import functools
+ cached = functools.lru_cache(1)(testfunction)
+
+ self.assertFalse(type(repr).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+ self.assertTrue(type(list.append).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+ self.assertTrue(type(list.__add__).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+ self.assertTrue(type(testfunction).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+ self.assertTrue(type(cached).__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+
+ self.assertTrue(_testcapi.MethodDescriptorBase.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+ self.assertTrue(_testcapi.MethodDescriptorDerived.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+ self.assertFalse(_testcapi.MethodDescriptorNopGet.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+
+ # Heap type should not inherit Py_TPFLAGS_METHOD_DESCRIPTOR
+ class MethodDescriptorHeap(_testcapi.MethodDescriptorBase):
+ pass
+ self.assertFalse(MethodDescriptorHeap.__flags__ & Py_TPFLAGS_METHOD_DESCRIPTOR)
+
+
class SubinterpreterTest(unittest.TestCase):
def test_subinterps(self):