test262/test/suite/ch15/15.2/15.2.3/15.2.3.9/15.2.3.9-2-a-2.js

/// 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.
/**
 * @path ch15/15.2/15.2.3/15.2.3.9/15.2.3.9-2-a-2.js
 * @description Object.freeze - 'P' is own data property that overrides an inherited data property
 */


function testcase() {

        var proto = { foo: 0 }; // default [[Configurable]] attribute value of foo: true

        var Con = function () { };
        Con.prototype = proto;

        var child = new Con();

        child.foo = 10; // default [[Configurable]] attribute value of foo: true
 
        Object.freeze(child);

        var desc = Object.getOwnPropertyDescriptor(child, "foo");

        delete child.foo;
        return child.foo === 10 && desc.configurable === false && desc.writable === false;
    }
runTestCase(testcase);