test_slicing.py 文件源码

def test_char_ptr(self):
        s = "abcdefghijklmnopqrstuvwxyz"

        dll = CDLL(_ctypes_test.__file__)
        dll.my_strdup.restype = POINTER(c_char)
        dll.my_free.restype = None
        res = dll.my_strdup(s)
        self.assertEqual(res[:len(s)], s)
        self.assertEqual(res[:3], s[:3])
        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])
        self.assertEqual(res[0:-1:-1], s[0::-1])

        import operator
        self.assertRaises(ValueError, operator.getitem,
                          res, slice(None, None, None))
        self.assertRaises(ValueError, operator.getitem,
                          res, slice(0, None, None))
        self.assertRaises(ValueError, operator.getitem,
                          res, slice(None, 5, -1))
        self.assertRaises(ValueError, operator.getitem,
                          res, slice(-5, None, None))

        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)

        dll.my_strdup.restype = POINTER(c_byte)
        res = dll.my_strdup(s)
        self.assertEqual(res[:len(s)], range(ord("a"), ord("z")+1))
        self.assertEqual(res[:len(s):], range(ord("a"), ord("z")+1))
        dll.my_free(res)