test/built-ins/Array/prototype/reduceRight/15.4.4.22-4-15.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: 15.4.4.22-4-15
description: >
    Array.prototype.reduceRight - calling with no callbackfn is the
    same as passing undefined for callbackfn
---*/

        var obj = { 10: 10 };
        var lengthAccessed = false;
        var loopAccessed = false;

        Object.defineProperty(obj, "length", {
            get: function () {
                lengthAccessed = true;
                return 20;
            },
            configurable: true
        });
        Object.defineProperty(obj, "0", {
            get: function () {
                loopAccessed = true;
                return 10;
            },
            configurable: true
        });
assert.throws(TypeError, function() {
            Array.prototype.reduceRight.call(obj, undefined);
});
assert(lengthAccessed, 'lengthAccessed !== true');
assert.sameValue(loopAccessed, false, 'loopAccessed');