1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
import unittest
from ctypes import *
from ctypes.test import need_symbol
formats = "bBhHiIlLqQfd"
formats = c_byte, c_ubyte, c_short, c_ushort, c_int, c_uint, \
c_long, c_ulonglong, c_float, c_double, c_longdouble
class ArrayTestCase(unittest.TestCase):
def test_simple(self):
# create classes holding simple numeric types, and check
# various properties.
init = range(15, 25)
for fmt in formats:
alen = len(init)
int_array = ARRAY(fmt, alen)
ia = int_array(*init)
# length of instance ok?
self.assertEqual(len(ia), alen)
# slot values ok?
values = [ia[i] for i in range(alen)]
self.assertEqual(values, init)
# out-of-bounds accesses should be caught
with self.assertRaises(IndexError): ia[alen]
with self.assertRaises(IndexError): ia[-alen-1]
# change the items
from operator import setitem
new_values = range(42, 42+alen)
[setitem(ia, n, new_values[n]) for n in range(alen)]
values = [ia[i] for i in range(alen)]
self.assertEqual(values, new_values)
# are the items initialized to 0?
ia = int_array()
values = [ia[i] for i in range(alen)]
self.assertEqual(values, [0] * alen)
# Too many initializers should be caught
self.assertRaises(IndexError, int_array, *range(alen*2))
CharArray = ARRAY(c_char, 3)
ca = CharArray("a", "b", "c")
# Should this work? It doesn't:
# CharArray("abc")
self.assertRaises(TypeError, CharArray, "abc")
self.assertEqual(ca[0], "a")
self.assertEqual(ca[1], "b")
self.assertEqual(ca[2], "c")
self.assertEqual(ca[-3], "a")
self.assertEqual(ca[-2], "b")
self.assertEqual(ca[-1], "c")
self.assertEqual(len(ca), 3)
# slicing is now supported, but not extended slicing (3-argument)!
from operator import getslice, delitem
self.assertRaises(TypeError, getslice, ca, 0, 1, -1)
# cannot delete items
self.assertRaises(TypeError, delitem, ca, 0)
def test_numeric_arrays(self):
alen = 5
numarray = ARRAY(c_int, alen)
na = numarray()
values = [na[i] for i in range(alen)]
self.assertEqual(values, [0] * alen)
na = numarray(*[c_int()] * alen)
values = [na[i] for i in range(alen)]
self.assertEqual(values, [0]*alen)
na = numarray(1, 2, 3, 4, 5)
values = [i for i in na]
self.assertEqual(values, [1, 2, 3, 4, 5])
na = numarray(*map(c_int, (1, 2, 3, 4, 5)))
values = [i for i in na]
self.assertEqual(values, [1, 2, 3, 4, 5])
def test_classcache(self):
self.assertIsNot(ARRAY(c_int, 3), ARRAY(c_int, 4))
self.assertIs(ARRAY(c_int, 3), ARRAY(c_int, 3))
def test_from_address(self):
# Failed with 0.9.8, reported by JUrner
p = create_string_buffer("foo")
sz = (c_char * 3).from_address(addressof(p))
self.assertEqual(sz[:], "foo")
self.assertEqual(sz[::], "foo")
self.assertEqual(sz[::-1], "oof")
self.assertEqual(sz[::3], "f")
self.assertEqual(sz[1:4:2], "o")
self.assertEqual(sz.value, "foo")
@need_symbol('create_unicode_buffer')
def test_from_addressW(self):
p = create_unicode_buffer("foo")
sz = (c_wchar * 3).from_address(addressof(p))
self.assertEqual(sz[:], "foo")
self.assertEqual(sz[::], "foo")
self.assertEqual(sz[::-1], "oof")
self.assertEqual(sz[::3], "f")
self.assertEqual(sz[1:4:2], "o")
self.assertEqual(sz.value, "foo")
def test_cache(self):
# Array types are cached internally in the _ctypes extension,
# in a WeakValueDictionary. Make sure the array type is
# removed from the cache when the itemtype goes away. This
# test will not fail, but will show a leak in the testsuite.
# Create a new type:
class my_int(c_int):
pass
# Create a new array type based on it:
t1 = my_int * 1
t2 = my_int * 1
self.assertIs(t1, t2)
if __name__ == '__main__':
unittest.main()
|
