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import unittest
from ctypes import *
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(len(init))]
self.assertEqual(values, init)
# 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(len(init))]
self.assertEqual(values, new_values)
# are the items initialized to 0?
ia = int_array()
values = [ia[i] for i in range(len(init))]
self.assertEqual(values, [0] * len(init))
# 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.assertTrue(not ARRAY(c_int, 3) is ARRAY(c_int, 4))
self.assertTrue(ARRAY(c_int, 3) is 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")
try:
create_unicode_buffer
except NameError:
pass
else:
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.assertTrue(t1 is t2)
if __name__ == '__main__':
unittest.main()
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