| // 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 array like to length throws |
| features: [Symbol.isConcatSpreadable] |
| ---*/ |
| var obj = { |
| "length": {valueOf: null, toString: null}, |
| "1": "A", |
| "3": "B", |
| "5": "C" |
| }; |
| obj[Symbol.isConcatSpreadable] = true; |
| var obj2 = { length: 3, "0": "0", "1": "1", "2": "2" }; |
| var arr = ["X", "Y", "Z"]; |
| assert.throws(TypeError, function() { |
| Array.prototype.concat.call(obj, obj2, arr); |
| }); |
