| // Copyright (c) 2014 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. |
| |
| |
| /*--- |
| esid: sec-array.prototype.concat |
| es6id: 22.1.3.1_3 |
| description: Array.prototype.concat sloppy arguments with dupes |
| flags: [noStrict] |
| includes: [compareArray.js] |
| features: [Symbol.isConcatSpreadable] |
| ---*/ |
| var args = (function(a, a, a) { return arguments; })(1,2,3); |
| args[Symbol.isConcatSpreadable] = true; |
| assert(compareArray([].concat(args, args), [1, 2, 3, 1, 2, 3])); |
| |
| Object.defineProperty(args, "length", { value: 6 }); |
| assert(compareArray([].concat(args), [1, 2, 3, void 0, void 0, void 0])); |
