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from ctypes import *
import unittest
class SimpleTestCase(unittest.TestCase):
def test_cint(self):
x = c_int()
self.assertEqual(x._objects, None)
x.value = 42
self.assertEqual(x._objects, None)
x = c_int(99)
self.assertEqual(x._objects, None)
def test_ccharp(self):
x = c_char_p()
self.assertEqual(x._objects, None)
x.value = b"abc"
self.assertEqual(x._objects, b"abc")
x = c_char_p(b"spam")
self.assertEqual(x._objects, b"spam")
class StructureTestCase(unittest.TestCase):
def test_cint_struct(self):
class X(Structure):
_fields_ = [("a", c_int),
("b", c_int)]
x = X()
self.assertEqual(x._objects, None)
x.a = 42
x.b = 99
self.assertEqual(x._objects, None)
def test_ccharp_struct(self):
class X(Structure):
_fields_ = [("a", c_char_p),
("b", c_char_p)]
x = X()
self.assertEqual(x._objects, None)
x.a = b"spam"
x.b = b"foo"
self.assertEqual(x._objects, {"0": b"spam", "1": b"foo"})
def test_struct_struct(self):
class POINT(Structure):
_fields_ = [("x", c_int), ("y", c_int)]
class RECT(Structure):
_fields_ = [("ul", POINT), ("lr", POINT)]
r = RECT()
r.ul.x = 0
r.ul.y = 1
r.lr.x = 2
r.lr.y = 3
self.assertEqual(r._objects, None)
r = RECT()
pt = POINT(1, 2)
r.ul = pt
self.assertEqual(r._objects, {'0': {}})
r.ul.x = 22
r.ul.y = 44
self.assertEqual(r._objects, {'0': {}})
r.lr = POINT()
self.assertEqual(r._objects, {'0': {}, '1': {}})
class ArrayTestCase(unittest.TestCase):
def test_cint_array(self):
INTARR = c_int * 3
ia = INTARR()
self.assertEqual(ia._objects, None)
ia[0] = 1
ia[1] = 2
ia[2] = 3
self.assertEqual(ia._objects, None)
class X(Structure):
_fields_ = [("x", c_int),
("a", INTARR)]
x = X()
x.x = 1000
x.a[0] = 42
x.a[1] = 96
self.assertEqual(x._objects, None)
x.a = ia
self.assertEqual(x._objects, {'1': {}})
class PointerTestCase(unittest.TestCase):
def test_p_cint(self):
i = c_int(42)
x = pointer(i)
self.assertEqual(x._objects, {'1': i})
class DeletePointerTestCase(unittest.TestCase):
@unittest.skip('test disabled')
def test_X(self):
class X(Structure):
_fields_ = [("p", POINTER(c_char_p))]
x = X()
i = c_char_p("abc def")
from sys import getrefcount as grc
print("2?", grc(i))
x.p = pointer(i)
print("3?", grc(i))
for i in range(320):
c_int(99)
x.p[0]
print(x.p[0])
## del x
## print "2?", grc(i)
## del i
import gc
gc.collect()
for i in range(320):
c_int(99)
x.p[0]
print(x.p[0])
print(x.p.contents)
## print x._objects
x.p[0] = "spam spam"
## print x.p[0]
print("+" * 42)
print(x._objects)
class PointerToStructure(unittest.TestCase):
def test(self):
class POINT(Structure):
_fields_ = [("x", c_int), ("y", c_int)]
class RECT(Structure):
_fields_ = [("a", POINTER(POINT)),
("b", POINTER(POINT))]
r = RECT()
p1 = POINT(1, 2)
r.a = pointer(p1)
r.b = pointer(p1)
## from pprint import pprint as pp
## pp(p1._objects)
## pp(r._objects)
r.a[0].x = 42
r.a[0].y = 99
# to avoid leaking when tests are run several times
# clean up the types left in the cache.
from ctypes import _pointer_type_cache
del _pointer_type_cache[POINT]
if __name__ == "__main__":
unittest.main()