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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 - k values are accessed during each
iteration and not prior to starting the loop on an Array
---*/
var result = true;
var kIndex = [];
var called = 0;
//By below way, we could verify that k would be setted as 0, 1, ..., length - 1 in order, and each value will be setted one time.
function callbackfn(prevVal, curVal, idx, obj) {
//Each position should be visited one time, which means k is accessed one time during iterations.
called++;
if (typeof kIndex[idx] === "undefined") {
//when current position is visited, its previous index should has been visited.
if (idx !== 0 && typeof kIndex[idx - 1] === "undefined") {
result = false;
}
kIndex[idx] = 1;
} else {
result = false;
}
}
[11, 12, 13, 14].reduce(callbackfn, 1);
assert(result, 'result !== true');
assert.sameValue(called, 4, 'called');
reportCompare(0, 0);
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