| // Copyright (C) 2020 Alexey Shvayka. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys |
| description: > |
| If "ownKeys" trap is null or undefined, [[OwnPropertyKeys]] call is |
| properly forwarded to [[ProxyTarget]] (which is also a Proxy object). |
| info: | |
| [[OwnPropertyKeys]] ( ) |
| |
| [...] |
| 4. Let target be O.[[ProxyTarget]]. |
| 5. Let trap be ? GetMethod(handler, "ownKeys"). |
| 6. If trap is undefined, then |
| a. Return ? target.[[OwnPropertyKeys]](). |
| |
| [[OwnPropertyKeys]] ( ) |
| |
| 1. Let keys be a new empty List. |
| [...] |
| 5. For each integer i starting with 0 such that i < len, in ascending order, do |
| a. Add ! ToString(i) as the last element of keys. |
| [...] |
| 7. For each own property key P of O such that Type(P) is String and P is not an |
| array index, in ascending chronological order of property creation, do |
| a. Add P as the last element of keys. |
| 8. For each own property key P of O such that Type(P) is Symbol, in ascending |
| chronological order of property creation, do |
| a. Add P as the last element of keys. |
| 9. Return keys. |
| includes: [compareArray.js] |
| features: [Symbol, Proxy, Reflect] |
| ---*/ |
| |
| var sym = Symbol(); |
| var string = new String("str"); |
| string[sym] = 1; |
| |
| var stringTarget = new Proxy(string, {}); |
| var stringProxy = new Proxy(stringTarget, {}); |
| |
| assert.compareArray( |
| Reflect.ownKeys(stringProxy), |
| ["0", "1", "2", "length", sym] |
| ); |