test262/test/built-ins/Object/defineProperty/15.2.3.6-4-85.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: 15.2.3.6-4-85
description: >
    Object.defineProperty will not throw TypeError if
    name.configurable = false, name.writable = false, name.value = NaN
    and desc.value = NaN (8.12.9 step 10.a.ii.1)
includes: [runTestCase.js]
---*/

function testcase() {

        var obj = {};

        Object.defineProperty(obj, "foo", {
            value: NaN,
            writable: false,
            configurable: false
        });

        Object.defineProperty(obj, "foo", {
            value: NaN,
            writable: false,
            configurable: false
        });

        if (!isNaN(obj.foo)) {
            return false;
        }

        obj.foo = "verifyValue";
        if (obj.foo === "verifyValue") {
            return false;
        }

        for (var prop in obj) {
            if (obj.hasOwnProperty(prop) && prop === "foo") {
                return false;
            }
        }

        delete obj.foo;
        if (!obj.hasOwnProperty("foo")) {
            return false;
        }

        return true;
    }
runTestCase(testcase);