js/src/tests/test262/built-ins/Array/prototype/reduce/15.4.4.21-9-c-ii-19.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 - value of 'accumulator' used for first
    iteration is the value of least index property which is not
    undefined when 'initialValue' is not present on an Array
---*/

var called = 0;
var result = false;

function callbackfn(prevVal, curVal, idx, obj) {
  called++;
  if (idx === 1) {
    result = (prevVal === 11) && curVal === 9;
  }
}

[11, 9].reduce(callbackfn);

assert(result, 'result !== true');
assert.sameValue(called, 1, 'called');

reportCompare(0, 0);