js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-primitive-non-number-length.js


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// 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
description: Array.prototype.concat array like primitive non number length
includes: [compareArray.js]
features: [Symbol.isConcatSpreadable]
---*/
var obj = {
  "1": "A",
  "3": "B",
  "5": "C"
};
obj[Symbol.isConcatSpreadable] = true;
obj.length = {
  toString: function() {
    return "SIX";
  },
  valueOf: null
};
assert.compareArray([].concat(obj), [], '[].concat({"1": "A", "3": "B", "5": "C"}) must return []');
obj.length = {
  toString: null,
  valueOf: function() {
    return "SIX";
  }
};
assert.compareArray([].concat(obj), [], '[].concat({"1": "A", "3": "B", "5": "C"}) must return []');

reportCompare(0, 0);