mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
907 B
34 lines
907 B
// Copyright 2017 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Flags: --allow-natives-syntax
|
|
|
|
// Ensure that mutation of the Object.keys result doesn't affect the
|
|
// enumeration cache for fast-mode objects.
|
|
(function() {
|
|
const a = {x:1, y:2};
|
|
let k = Object.keys(a);
|
|
%HeapObjectVerify(k);
|
|
assertEquals(2, k.length);
|
|
assertEquals("x", k[0]);
|
|
assertEquals("y", k[1]);
|
|
k[0] = "y";
|
|
k[1] = "x";
|
|
k = Object.keys(a);
|
|
assertEquals(2, k.length);
|
|
assertEquals("x", k[0]);
|
|
assertEquals("y", k[1]);
|
|
})();
|
|
|
|
// Ensure that the copy-on-write keys are handled properly, even in
|
|
// the presence of Symbols.
|
|
(function() {
|
|
const s = Symbol();
|
|
const a = {[s]: 1};
|
|
let k = Object.keys(a);
|
|
%HeapObjectVerify(k);
|
|
assertEquals(0, k.length);
|
|
k.shift();
|
|
assertEquals(0, k.length);
|
|
})();
|
|
|