JSTests/test262/test/built-ins/Array/prototype/reduceRight/15.4.4.22-3-23.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-array.prototype.reduceright
description: >
    Array.prototype.reduceRight uses inherited valueOf method when
    'length' is an object with an own toString and inherited valueOf
    methods
---*/

var testResult1 = true;
var testResult2 = false;
var valueOfAccessed = false;
var toStringAccessed = false;

var proto = {
  valueOf: function() {
    valueOfAccessed = true;
    return 2;
  }
};
var Con = function() {};
Con.prototype = proto;
var child = new Con();

function callbackfn(prevVal, curVal, idx, obj) {
  if (idx > 1) {
    testResult1 = false;
  }

  if (idx === 1) {
    testResult2 = true;
  }
  return false;
}

child.toString = function() {
  toStringAccessed = true;
  return '1';
};

var obj = {
  0: 12,
  1: 11,
  2: 9,
  length: child
};

Array.prototype.reduceRight.call(obj, callbackfn, 1);

assert(testResult1, 'testResult1 !== true');
assert(testResult2, 'testResult2 !== true');
assert(valueOfAccessed, 'valueOfAccessed !== true');
assert.sameValue(toStringAccessed, false, 'toStringAccessed');