// Copyright 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."use strict";varbool=newBoolean(true)// Boolean wrapper objects are not concat-spreadable by defaultassertEquals([bool],[].concat(bool));// Boolean wrapper objects may be individually concat-spreadablebool[Symbol.isConcatSpreadable]=true;bool.length=3;bool[0]=1,bool[1]=2,bool[2]=3;assertEquals([1,2,3],[].concat(bool));Boolean.prototype[Symbol.isConcatSpreadable]=true;// Boolean wrapper objects may be concat-spreadableassertEquals([],[].concat(newBoolean(true)));Boolean.prototype[0]=1;Boolean.prototype[1]=2;Boolean.prototype[2]=3;Boolean.prototype.length=3;assertEquals([1,2,3],[].concat(newBoolean(true)));// Boolean values are never concat-spreadableassertEquals([true],[].concat(true));