Showing content from http://svn.python.org/projects/python/branches/ctypes-branch/Lib/ctypes/test/test_checkretval.py below:
import unittest import sys from ctypes import * class CHECKED(c_int): def _check_retval_(value): # Receives a CHECKED instance. return str(value.value) _check_retval_ = staticmethod(_check_retval_) class Test(unittest.TestCase): def test_checkretval(self): import _ctypes_test dll = CDLL(_ctypes_test.__file__) self.failUnlessEqual(42, dll._testfunc_p_p(42)) dll._testfunc_p_p.restype = CHECKED self.failUnlessEqual("42", dll._testfunc_p_p(42)) dll._testfunc_p_p.restype = None self.failUnlessEqual(None, dll._testfunc_p_p(42)) del dll._testfunc_p_p.restype self.failUnlessEqual(42, dll._testfunc_p_p(42)) try: oledll except NameError: pass else: def test_oledll(self): self.failUnlessRaises(WindowsError, oledll.oleaut32.CreateTypeLib2, 0, None, None) if __name__ == "__main__": unittest.main()
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