test/built-ins/Object/defineProperty/15.2.3.6-4-150.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.

/*---
es5id: 15.2.3.6-4-150
description: >
    Object.defineProperty - 'O' is an Array, 'name' is the length
    property of 'O', test TypeError is thrown when the [[Value]] field
    of 'desc' is an Object that both toString and valueOf wouldn't
    return primitive value (15.4.5.1 step 3.c)
---*/

        var arrObj = [];
        var toStringAccessed = false;
        var valueOfAccessed = false;
assert.throws(TypeError, function() {
            Object.defineProperty(arrObj, "length", {
                value: {
                    toString: function () {
                        toStringAccessed = true;
                        return {};
                    },

                    valueOf: function () {
                        valueOfAccessed = true;
                        return {};
                    }
                }
            });
});
assert(toStringAccessed, 'toStringAccessed !== true');
assert(valueOfAccessed, 'valueOfAccessed !== true');