1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
// Copyright (C) 2017 Caio Lima. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Mapped arguments property descriptor change to non-writable, non-enumerable and non-configurable
info: |
Change the descriptor using [[DefineOwnProperty]] to
{writable: false, enumerable: false}, change argument[0]
value to 2 using [[DefineOwnProperty]] and then
change property descriptor to {configurable: false}.
The descriptor's enumerable property continues with its configured value.
flags: [noStrict]
esid: sec-arguments-exotic-objects-defineownproperty-p-desc
includes: [propertyHelper.js]
---*/
function fn(a) {
Object.defineProperty(arguments, "0", {writable: false, enumerable: false, value: 2, configurable: false});
let propertyDescriptor = Object.getOwnPropertyDescriptor(arguments, "0");
assert.sameValue(propertyDescriptor.value, 2);
assert.sameValue(arguments[0], 2);
verifyNotEnumerable(arguments, "0");
verifyNotWritable(arguments, "0");
verifyNotConfigurable(arguments, "0");
}
fn(1);
|
