test/built-ins/Array/prototype/filter/15.4.4.20-9-b-14.js


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

/*---
es5id: 15.4.4.20-9-b-14
description: >
    Array.prototype.filter - decreasing length of array causes index
    property not to be visited
includes: [runTestCase.js]
---*/

function testcase() {

        function callbackfn(val, idx, obj) {
            return true;
        }
        var arr = [0, 1, 2, "last"];

        Object.defineProperty(arr, "0", {
            get: function () {
                arr.length = 3;
                return 0;
            },
            configurable: true
        });

        var newArr = arr.filter(callbackfn);


        return newArr.length === 3 && newArr[2] === 2;
    }
runTestCase(testcase);