test262/test/built-ins/Object/defineProperty/15.2.3.6-3-86-1.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: 15.2.3.6-3-86-1
description: >
    Object.defineProperty - 'Attributes' is a Function object which
    implements its own [[Get]] method to access the 'configurable'
    property of prototype object (8.10.5 step 4.a)
includes: [runTestCase.js]
---*/

function testcase() {
        var obj = {};
        try {
            Function.prototype.configurable = true;
            var funObj = function (a, b) {
                return a + b;
            };

            Object.defineProperty(obj, "property", funObj);

            var beforeDeleted = obj.hasOwnProperty("property");

            delete obj.property;

            var afterDeleted = obj.hasOwnProperty("property");

            return beforeDeleted === true && afterDeleted === false;
        } finally {
            delete Function.prototype.configurable;
        }
    }
runTestCase(testcase);