test_slicing.py 文件源码

def test_wchar_ptr(self):
        s = u"abcdefghijklmnopqrstuvwxyz\0"

        dll = CDLL(_ctypes_test.__file__)
        dll.my_wcsdup.restype = POINTER(c_wchar)
        dll.my_wcsdup.argtypes = POINTER(c_wchar),
        dll.my_free.restype = None
        res = dll.my_wcsdup(s)
        self.assertEqual(res[:len(s)], s)
        self.assertEqual(res[:len(s):], s)
        self.assertEqual(res[len(s)-1:-1:-1], s[::-1])
        self.assertEqual(res[len(s)-1:5:-7], s[:5:-7])

        import operator
        self.assertRaises(TypeError, operator.setslice,
                          res, 0, 5, u"abcde")
        self.assertRaises(TypeError, operator.setitem,
                          res, slice(0, 5), u"abcde")
        dll.my_free(res)

        if sizeof(c_wchar) == sizeof(c_short):
            dll.my_wcsdup.restype = POINTER(c_short)
        elif sizeof(c_wchar) == sizeof(c_int):
            dll.my_wcsdup.restype = POINTER(c_int)
        elif sizeof(c_wchar) == sizeof(c_long):
            dll.my_wcsdup.restype = POINTER(c_long)
        else:
            self.skipTest('Pointers to c_wchar are not supported')
        res = dll.my_wcsdup(s)
        tmpl = range(ord("a"), ord("z")+1)
        self.assertEqual(res[:len(s)-1], tmpl)
        self.assertEqual(res[:len(s)-1:], tmpl)
        self.assertEqual(res[len(s)-2:-1:-1], tmpl[::-1])
        self.assertEqual(res[len(s)-2:5:-7], tmpl[:5:-7])
        dll.my_free(res)

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