JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-4-456.js

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

/*---
es5id: 15.2.3.6-4-456
description: >
    ES5 Attributes - fail to update [[Configurable]] attribute of
    accessor property ([[Get]] is undefined, [[Set]] is undefined,
    [[Enumerable]] is false, [[Configurable]] is false) to different
    value
includes: [propertyHelper.js]
---*/

var obj = {};

Object.defineProperty(obj, "prop", {
    get: undefined,
    set: undefined,
    enumerable: false,
    configurable: false
});
var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");

try {
    Object.defineProperty(obj, "prop", {
        configurable: true
    });

    $ERROR("Expected TypeError");
} catch (e) {
    assert(e instanceof TypeError);
    
    var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");

    assert.sameValue(desc1.configurable, false);
    assert.sameValue(desc2.configurable, false);

    verifyNotConfigurable(obj, "prop");

    assert(obj.hasOwnProperty("prop"));
}