| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-array.prototype.keys |
| description: > |
| Creates an iterator from a custom object. |
| info: | |
| 22.1.3.13 Array.prototype.keys ( ) |
| |
| 1. Let O be ToObject(this value). |
| 2. ReturnIfAbrupt(O). |
| 3. Return CreateArrayIterator(O, "key"). |
| features: [Symbol.iterator] |
| ---*/ |
| |
| var obj = { |
| length: 2 |
| }; |
| var iter = Array.prototype.keys.call(obj); |
| var ArrayIteratorProto = Object.getPrototypeOf([][Symbol.iterator]()); |
| |
| assert.sameValue( |
| Object.getPrototypeOf(iter), ArrayIteratorProto, |
| 'The prototype of [].keys() is %ArrayIteratorPrototype%' |
| ); |
