test262/test/built-ins/Object/defineProperty/15.2.3.6-4-172.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: 15.2.3.6-4-172
description: >
    Object.defineProperty - 'O' is an Array, 'name' 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 an
    inherited data property can stop deleting index named properties
    (15.4.5.1 step 3.l.ii)
includes: [runTestCase.js]
---*/

function testcase() {

        var arrObj = [0, 1];
        try {
            Object.defineProperty(arrObj, "1", {
                configurable: false
            });
            
            Array.prototype[1] = 2;
            Object.defineProperty(arrObj, "length", {
                value: 1
            });
            return false;
        } catch (e) {
            return e instanceof TypeError && arrObj.length === 2 && arrObj.hasOwnProperty("1"); 
        } finally {
            delete Array.prototype[1];
        }
    }
runTestCase(testcase);