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Original file line number	Diff line number	Diff line change
Expand Up		@@ -3,6 +3,7 @@
		from test import support
		import unittest
		import os
		import sys

		import _ctypes_test

Expand Down Expand Up		@@ -236,6 +237,79 @@ class X(Structure):
		else:
		self.assertEqual(sizeof(X), sizeof(c_int) * 2)

		@unittest.skipIf(sys.platform == 'win32', "Doesn't fail on Windows")
		@unittest.expectedFailure # gh-97588
		def test_mixed_5(self):
		class X(Structure):
		_fields_ = [
		('A', c_uint, 1),
		('B', c_ushort, 16)]
		a = X()
		a.A = 0
		a.B = 1
		self.assertEqual(1, a.B)

		@unittest.skipIf(sys.platform == 'win32', "Doesn't fail on Windows")
		@unittest.expectedFailure # gh-97588
		def test_mixed_6(self):
		class X(Structure):
		_fields_ = [
		('A', c_ulonglong, 1),
		('B', c_uint, 32)]
		a = X()
		a.A = 0
		a.B = 1
		self.assertEqual(1, a.B)

		@unittest.skipIf(sys.platform == 'win32', "Doesn't fail on Windows")
		@unittest.expectedFailure # gh-97588
		def test_mixed_7(self):
		class X(Structure):
		_fields_ = [
		("A", c_uint),
		('B', c_uint, 20),
		('C', c_ulonglong, 24)]
		self.assertEqual(16, sizeof(X))

		@unittest.skipIf(sys.platform == 'win32', "Doesn't fail on Windows")
		@unittest.expectedFailure # gh-97588
		def test_mixed_8(self):
		class Foo(Structure):
		_fields_ = [
		("A", c_uint),
		("B", c_uint, 32),
		("C", c_ulonglong, 1),
		]

		class Bar(Structure):
		_fields_ = [
		("A", c_uint),
		("B", c_uint),
		("C", c_ulonglong, 1),
		]
		self.assertEqual(sizeof(Foo), sizeof(Bar))

		@unittest.skipIf(sys.platform == 'win32', "Doesn't fail on Windows")
		@unittest.expectedFailure # gh-97588
		def test_mixed_9(self):
		class X(Structure):
		_fields_ = [
		("A", c_uint8),
		("B", c_uint, 1),
		]
		self.assertEqual(4, sizeof(X))

		@unittest.skipIf(sys.platform == 'win32', "Doesn't fail on Windows")
		@unittest.expectedFailure # gh-97588
		def test_mixed_10(self):
		class X(Structure):
		_fields_ = [
		("A", c_uint32, 1),
		("B", c_uint64, 1),
		]
		self.assertEqual(8, alignment(X))
		self.assertEqual(8, sizeof(X))

		def test_anon_bitfields(self):
		# anonymous bit-fields gave a strange error message
		class X(Structure):
Expand Down

1 change: 1 addition & 0 deletions 1 Misc/NEWS.d/next/C API/2022-09-30-07-16-00.gh-issue-97588.yQFteB.rst

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Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Add failing tests to document problems with ctypes structs.

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