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import unittest
from ctypes import *
class MyInt(c_int):
def __cmp__(self, other):
if type(other) != MyInt:
return -1
return cmp(self.value, other.value)
def __hash__(self): # Silence Py3k warning
return hash(self.value)
class Test(unittest.TestCase):
def test_compare(self):
self.assertEqual(MyInt(3), MyInt(3))
self.assertNotEqual(MyInt(42), MyInt(43))
def test_ignore_retval(self):
# Test if the return value of a callback is ignored
# if restype is None
proto = CFUNCTYPE(None)
def func():
return (1, "abc", None)
cb = proto(func)
self.assertEqual(None, cb())
def test_int_callback(self):
args = []
def func(arg):
args.append(arg)
return arg
cb = CFUNCTYPE(None, MyInt)(func)
self.assertEqual(None, cb(42))
self.assertEqual(type(args[-1]), MyInt)
cb = CFUNCTYPE(c_int, c_int)(func)
self.assertEqual(42, cb(42))
self.assertEqual(type(args[-1]), int)
def test_int_struct(self):
class X(Structure):
_fields_ = [("x", MyInt)]
self.assertEqual(X().x, MyInt())
s = X()
s.x = MyInt(42)
self.assertEqual(s.x, MyInt(42))
if __name__ == "__main__":
unittest.main()
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