test262/test/built-ins/Object/seal/15.2.3.8-2-a-5.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.

/*---
es5id: 15.2.3.8-2-a-5
description: >
    Object.seal - 'P' is own accessor property that overrides an
    inherited data property
includes: [runTestCase.js]
---*/

function testcase() {
        var proto = {};

        Object.defineProperty(proto, "foo", {
            value: 0,
            configurable: true
        });

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

        var child = new ConstructFun();
        
        Object.defineProperty(child, "foo", {
            get: function () {
                return 10;
            },
            configurable: true
        });
        var preCheck = Object.isExtensible(child);
        Object.seal(child);

        delete child.foo;
        return preCheck && child.foo === 10;
    }
runTestCase(testcase);