test/built-ins/Array/prototype/reduceRight/15.4.4.22-8-b-2.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: 15.4.4.22-8-b-2
description: >
    Array.prototype.reduceRight - modifications to length don't change
    number of iterations in step 9
---*/

var called = 0;

function callbackfn(prevVal, curVal, idx, obj) {
  called++;
  return prevVal + curVal;
}

var arr = [0, 1, 2, 3];
Object.defineProperty(arr, "4", {
  get: function() {
    arr.length = 2;
    return 10;
  },
  configurable: true
});

var preVal = arr.reduceRight(callbackfn);

assert.sameValue(preVal, 11, 'preVal');
assert.sameValue(called, 2, 'called');