/Lib/ctypes/test/test_anon.py
http://unladen-swallow.googlecode.com/ · Python · 60 lines · 46 code · 12 blank · 2 comment · 1 complexity · 5b941e6ca4cde98c1f6dbedefd609872 MD5 · raw file
- import unittest
- from ctypes import *
- class AnonTest(unittest.TestCase):
- def test_anon(self):
- class ANON(Union):
- _fields_ = [("a", c_int),
- ("b", c_int)]
- class Y(Structure):
- _fields_ = [("x", c_int),
- ("_", ANON),
- ("y", c_int)]
- _anonymous_ = ["_"]
- self.failUnlessEqual(Y.a.offset, sizeof(c_int))
- self.failUnlessEqual(Y.b.offset, sizeof(c_int))
- self.failUnlessEqual(ANON.a.offset, 0)
- self.failUnlessEqual(ANON.b.offset, 0)
- def test_anon_nonseq(self):
- # TypeError: _anonymous_ must be a sequence
- self.failUnlessRaises(TypeError,
- lambda: type(Structure)("Name",
- (Structure,),
- {"_fields_": [], "_anonymous_": 42}))
- def test_anon_nonmember(self):
- # AttributeError: type object 'Name' has no attribute 'x'
- self.failUnlessRaises(AttributeError,
- lambda: type(Structure)("Name",
- (Structure,),
- {"_fields_": [],
- "_anonymous_": ["x"]}))
- def test_nested(self):
- class ANON_S(Structure):
- _fields_ = [("a", c_int)]
- class ANON_U(Union):
- _fields_ = [("_", ANON_S),
- ("b", c_int)]
- _anonymous_ = ["_"]
- class Y(Structure):
- _fields_ = [("x", c_int),
- ("_", ANON_U),
- ("y", c_int)]
- _anonymous_ = ["_"]
- self.failUnlessEqual(Y.x.offset, 0)
- self.failUnlessEqual(Y.a.offset, sizeof(c_int))
- self.failUnlessEqual(Y.b.offset, sizeof(c_int))
- self.failUnlessEqual(Y._.offset, sizeof(c_int))
- self.failUnlessEqual(Y.y.offset, sizeof(c_int) * 2)
- if __name__ == "__main__":
- unittest.main()