test/built-ins/Array/prototype/reduceRight/15.4.4.22-7-6.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: 15.4.4.22-7-6
description: >
    Array.prototype.reduceRight returns initialValue if 'length' is 0
    and initialValue is present (subclassed Array, length overridden
    with obj with valueOf)
---*/

foo.prototype = new Array(1, 2, 3);

function foo() {}
var f = new foo();

var o = {
  valueOf: function() {
    return 0;
  }
};
f.length = o;

function cb() {}
assert.sameValue(f.reduceRight(cb, 1), 1, 'f.reduceRight(cb,1)');