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bpo-36922: implement PEP-590 Py_TPFLAGS_METHOD_DESCRIPTOR (GH-13338)

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Co-authored-by: Mark Shannon <mark@hotpy.org>
This commit is contained in:
Jeroen Demeyer 2019-05-28 14:42:53 +02:00 • committed by Petr Viktorin
parent 0811f2d81a
commit eb65e2443a
10 changed files with 132 additions and 7 deletions
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24
Lib/test/test_capi.py
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@ -27,6 +27,8 @@ _testcapi = support.import_module('_testcapi')
# 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 @@ class TestPendingCalls(unittest.TestCase):
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):