1// Copyright 2015 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Flags: --harmony-proxies
6
7var target = {
8  target: 1
9};
10target.__proto__ = {
11  target_proto: 2
12};
13
14var handler = {
15  ownKeys: function(target) {
16    return ["foo", "bar", Symbol("baz"), "non-enum", "not-found"];
17  },
18  getOwnPropertyDescriptor: function(target, name) {
19    if (name == "non-enum") return {configurable: true};
20    if (name == "not-found") return undefined;
21    return {enumerable: true, configurable: true};
22  }
23}
24
25var proxy = new Proxy(target, handler);
26
27// Object.keys() ignores symbols and non-enumerable keys.
28assertEquals(["foo", "bar"], Object.keys(proxy));
29
30// Edge case: no properties left after filtering.
31handler.getOwnPropertyDescriptor = undefined;
32assertEquals([], Object.keys(proxy));
33
34// Throwing shouldn't crash.
35handler.getOwnPropertyDescriptor = function() { throw new Number(1); };
36assertThrows("Object.keys(proxy)", Number);
37
38// Fall through to target if there is no trap.
39handler.ownKeys = undefined;
40assertEquals(["target"], Object.keys(proxy));
41assertEquals(["target"], Object.keys(target));
42