test262/test/built-ins/Object/defineProperties/15.2.3.7-6-a-169.js

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

/*---
es5id: 15.2.3.7-6-a-169
description: >
    Object.defineProperties - 'O' is an Array, 'P' is the length
    property of 'O', the [[Value]] field of 'desc' is less than value
    of  the length property, test the [[Configurable]] attribute of
    own data property with large index named in 'O' that overrides
    inherited accessor property can stop deleting index named
    properties (15.4.5.1 step 3.l.ii)
includes: [runTestCase.js]
---*/

function testcase() {
    
        var arr = [0, 1];
        try {
            Object.defineProperty(arr, "1", {
                configurable: false
            });

            Object.defineProperty(Array.prototype, "1", {
                get: function () {
                    return 2;
                },
                configurable: true
            });

            Object.defineProperties(arr, {
                length: {
                    value: 1
                }
            });

            return false;
        } catch (e) {
            return e instanceof TypeError && arr.length === 2 && arr.hasOwnProperty("1") &&
                arr[0] === 0 && arr[1] === 1 && Array.prototype[1] === 2;
        } finally {
            delete Array.prototype[1];
        }
    }
runTestCase(testcase);