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

#	count	content
1	n/a	# This tests the internal _objects attribute
2	n/a	import unittest
3	n/a	from ctypes import *
4	n/a	from sys import getrefcount as grc
5	n/a
6	n/a	# XXX This test must be reviewed for correctness!!!
7	n/a
8	n/a	# ctypes' types are container types.
9	n/a	#
10	n/a	# They have an internal memory block, which only consists of some bytes,
11	n/a	# but it has to keep references to other objects as well. This is not
12	n/a	# really needed for trivial C types like int or char, but it is important
13	n/a	# for aggregate types like strings or pointers in particular.
14	n/a	#
15	n/a	# What about pointers?
16	n/a
17	n/a	class ObjectsTestCase(unittest.TestCase):
18	n/a	def assertSame(self, a, b):
19	n/a	self.assertEqual(id(a), id(b))
20	n/a
21	n/a	def test_ints(self):
22	n/a	i = 42000123
23	n/a	refcnt = grc(i)
24	n/a	ci = c_int(i)
25	n/a	self.assertEqual(refcnt, grc(i))
26	n/a	self.assertEqual(ci._objects, None)
27	n/a
28	n/a	def test_c_char_p(self):
29	n/a	s = b"Hello, World"
30	n/a	refcnt = grc(s)
31	n/a	cs = c_char_p(s)
32	n/a	self.assertEqual(refcnt + 1, grc(s))
33	n/a	self.assertSame(cs._objects, s)
34	n/a
35	n/a	def test_simple_struct(self):
36	n/a	class X(Structure):
37	n/a	_fields_ = [("a", c_int), ("b", c_int)]
38	n/a
39	n/a	a = 421234
40	n/a	b = 421235
41	n/a	x = X()
42	n/a	self.assertEqual(x._objects, None)
43	n/a	x.a = a
44	n/a	x.b = b
45	n/a	self.assertEqual(x._objects, None)
46	n/a
47	n/a	def test_embedded_structs(self):
48	n/a	class X(Structure):
49	n/a	_fields_ = [("a", c_int), ("b", c_int)]
50	n/a
51	n/a	class Y(Structure):
52	n/a	_fields_ = [("x", X), ("y", X)]
53	n/a
54	n/a	y = Y()
55	n/a	self.assertEqual(y._objects, None)
56	n/a
57	n/a	x1, x2 = X(), X()
58	n/a	y.x, y.y = x1, x2
59	n/a	self.assertEqual(y._objects, {"0": {}, "1": {}})
60	n/a	x1.a, x2.b = 42, 93
61	n/a	self.assertEqual(y._objects, {"0": {}, "1": {}})
62	n/a
63	n/a	def test_xxx(self):
64	n/a	class X(Structure):
65	n/a	_fields_ = [("a", c_char_p), ("b", c_char_p)]
66	n/a
67	n/a	class Y(Structure):
68	n/a	_fields_ = [("x", X), ("y", X)]
69	n/a
70	n/a	s1 = b"Hello, World"
71	n/a	s2 = b"Hallo, Welt"
72	n/a
73	n/a	x = X()
74	n/a	x.a = s1
75	n/a	x.b = s2
76	n/a	self.assertEqual(x._objects, {"0": s1, "1": s2})
77	n/a
78	n/a	y = Y()
79	n/a	y.x = x
80	n/a	self.assertEqual(y._objects, {"0": {"0": s1, "1": s2}})
81	n/a	## x = y.x
82	n/a	## del y
83	n/a	## print x._b_base_._objects
84	n/a
85	n/a	def test_ptr_struct(self):
86	n/a	class X(Structure):
87	n/a	_fields_ = [("data", POINTER(c_int))]
88	n/a
89	n/a	A = c_int*4
90	n/a	a = A(11, 22, 33, 44)
91	n/a	self.assertEqual(a._objects, None)
92	n/a
93	n/a	x = X()
94	n/a	x.data = a
95	n/a	##XXX print x._objects
96	n/a	##XXX print x.data[0]
97	n/a	##XXX print x.data._objects
98	n/a
99	n/a	if __name__ == '__main__':
100	n/a	unittest.main()