js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-i-4.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.reduce
description: >
    Array.prototype.reduce - element to be retrieved is own data
    property that overrides an inherited data property on an Array
---*/

var testResult = false;
var initialValue = 0;

function callbackfn(prevVal, curVal, idx, obj) {
  if (idx === 1) {
    testResult = (curVal === 1);
  }
}

Array.prototype[1] = "3";
[0, 1, 2].reduce(callbackfn, initialValue);

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

reportCompare(0, 0);