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


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// Copyright (c) 2012 Ecma International.  All rights reserved.
// Ecma International makes this code available under the terms and conditions set
// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
// "Use Terms").   Any redistribution of this code must retain the above
// copyright and this notice and otherwise comply with the Use Terms.

/*---
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)
includes: [runTestCase.js]
---*/

function testcase() {

        var arrObj = [];
        var toStringAccessed = false;
        var valueOfAccessed = false;

        try {
            Object.defineProperty(arrObj, "length", {
                value: {
                    toString: function () {
                        toStringAccessed = true;
                        return {};
                    },

                    valueOf: function () {
                        valueOfAccessed = true;
                        return {};
                    }
                }
            });
            return false;

        } catch (e) {
            return e instanceof TypeError && toStringAccessed && valueOfAccessed;
        }
    }
runTestCase(testcase);