test/built-ins/Array/prototype/reduce/15.4.4.21-3-22.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
es5id: 15.4.4.21-3-22
description: >
    Array.prototype.reduce throws TypeError exception - 'length' is an
    object with toString and valueOf methods that don�t return
    primitive values
---*/

        var accessed = false;
        var valueOfAccessed = false;
        var toStringAccessed = false;

        function callbackfn(prevVal, curVal, idx, obj) {
            accessed = true;
            return true;
        }

        var obj = {
            1: 11,
            2: 12,

            length: {
                valueOf: function () {
                    valueOfAccessed = true;
                    return {};
                },
                toString: function () {
                    toStringAccessed = true;
                    return {};
                }
            }
        };
assert.throws(TypeError, function() {
            Array.prototype.reduce.call(obj, callbackfn, 1);
});
assert.sameValue(accessed, false, 'accessed');
assert(toStringAccessed, 'toStringAccessed !== true');
assert(valueOfAccessed, 'valueOfAccessed !== true');