Python code coverage for Lib/ctypes/test/test_array_in_pointer.py

#	count	content
1	n/a	import unittest
2	n/a	from ctypes import *
3	n/a	from binascii import hexlify
4	n/a	import re
5	n/a
6	n/a	def dump(obj):
7	n/a	# helper function to dump memory contents in hex, with a hyphen
8	n/a	# between the bytes.
9	n/a	h = hexlify(memoryview(obj)).decode()
10	n/a	return re.sub(r"(..)", r"\1-", h)[:-1]
11	n/a
12	n/a
13	n/a	class Value(Structure):
14	n/a	_fields_ = [("val", c_byte)]
15	n/a
16	n/a	class Container(Structure):
17	n/a	_fields_ = [("pvalues", POINTER(Value))]
18	n/a
19	n/a	class Test(unittest.TestCase):
20	n/a	def test(self):
21	n/a	# create an array of 4 values
22	n/a	val_array = (Value * 4)()
23	n/a
24	n/a	# create a container, which holds a pointer to the pvalues array.
25	n/a	c = Container()
26	n/a	c.pvalues = val_array
27	n/a
28	n/a	# memory contains 4 NUL bytes now, that's correct
29	n/a	self.assertEqual("00-00-00-00", dump(val_array))
30	n/a
31	n/a	# set the values of the array through the pointer:
32	n/a	for i in range(4):
33	n/a	c.pvalues[i].val = i + 1
34	n/a
35	n/a	values = [c.pvalues[i].val for i in range(4)]
36	n/a
37	n/a	# These are the expected results: here s the bug!
38	n/a	self.assertEqual(
39	n/a	(values, dump(val_array)),
40	n/a	([1, 2, 3, 4], "01-02-03-04")
41	n/a	)
42	n/a
43	n/a	def test_2(self):
44	n/a
45	n/a	val_array = (Value * 4)()
46	n/a
47	n/a	# memory contains 4 NUL bytes now, that's correct
48	n/a	self.assertEqual("00-00-00-00", dump(val_array))
49	n/a
50	n/a	ptr = cast(val_array, POINTER(Value))
51	n/a	# set the values of the array through the pointer:
52	n/a	for i in range(4):
53	n/a	ptr[i].val = i + 1
54	n/a
55	n/a	values = [ptr[i].val for i in range(4)]
56	n/a
57	n/a	# These are the expected results: here s the bug!
58	n/a	self.assertEqual(
59	n/a	(values, dump(val_array)),
60	n/a	([1, 2, 3, 4], "01-02-03-04")
61	n/a	)
62	n/a
63	n/a	if __name__ == "__main__":
64	n/a	unittest.main()