test/built-ins/Object/preventExtensions/15.2.3.10-3-5-1.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: 15.2.3.10-3-5-1
description: >
    Object.preventExtensions - indexed properties cannot be added into
    a String object
includes: [runTestCase.js]
---*/

function testcase() {
        var strObj = new String("bbq");
        var preCheck = Object.isExtensible(strObj);
        Object.preventExtensions(strObj);

        strObj[10] = 12;
        return preCheck && !strObj.hasOwnProperty("10");
    }
runTestCase(testcase);