test262/test/suite/chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-172.js

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/**
 * @path chapter15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-172.js
 * @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)
 */


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);