test262/test/built-ins/Object/defineProperty/15.2.3.6-4-193.js

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

/*---
es5id: 15.2.3.6-4-193
description: >
    Object.defineProperty - 'O' is an Array, 'name' is an array index
    named property, 'name' is own data property that overrides an
    inherited accessor property, test TypeError is thrown when update
    the [[Configurable]] attribute to true and value of
    [[Configurable]] attribute of original is false  (15.4.5.1 step
    4.c)
includes: [runTestCase.js]
---*/

function testcase() {
        try {
            Object.defineProperty(Array.prototype, "0", {
                get: function () {
                    return 11;
                },
                configurable: true
            });

            var arrObj = [];
            Object.defineProperty(arrObj, "0", {
                value: 12,
                configurable: false
            });

            Object.defineProperty(arrObj, "0", {
                configurable: true
            });
            return false;
        } catch (e) {
            return e instanceof TypeError && Array.prototype[0] === 11 && arrObj[0] === 12;
        } finally {
            delete Array.prototype[0];
        }
    }
runTestCase(testcase);