JSTests/test262/test/built-ins/Object/seal/15.2.3.8-2-2.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.2.3.8-2-2
description: Object.seal - inherited data properties are ignored
---*/

        var proto = {};

        Object.defineProperty(proto, "Father", {
            value: 10,
            configurable: true
        });

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

        var child = new ConstructFun();
        var preCheck = Object.isExtensible(child);
        Object.seal(child);

        var beforeDeleted = proto.hasOwnProperty("Father");
        delete proto.Father;
        var afterDeleted = proto.hasOwnProperty("Father");

assert(preCheck, 'preCheck !== true');
assert(beforeDeleted, 'beforeDeleted !== true');
assert.sameValue(afterDeleted, false, 'afterDeleted');