test/built-ins/Array/prototype/reduceRight/15.4.4.22-9-b-27.js


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// 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
es5id: 15.4.4.22-9-b-27
description: >
    Array.prototype.reduceRight - decreasing length of array causes
    deleted index property not to be visited
---*/

var accessed = false;
var testResult = true;

function callbackfn(prevVal, curVal, idx, obj) {
  accessed = true;
  if (idx === 2) {
    testResult = false;
  }
}

var arr = [0, 1, 2, 3];

Object.defineProperty(arr, "3", {
  get: function() {
    arr.length = 2;
    return 0;
  },
  configurable: true
});

arr.reduceRight(callbackfn, "initialValue");

assert(testResult, 'testResult !== true');
assert(accessed, 'accessed !== true');