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/**
 * @path ch15/15.4/15.4.4/15.4.4.20/15.4.4.20-9-b-5.js
 * @description Array.prototype.filter - properties added into own object after current position are visited on an Array
 */


function testcase() {
        function callbackfn(val, idx, obj) {
            return true;
        }

        var arr = [0, , 2];

        Object.defineProperty(arr, "0", {
            get: function () {
                Object.defineProperty(arr, "1", {
                    get: function () {
                        return 6.99;
                    },
                    configurable: true
                });
                return 0;
            },
            configurable: true
        });

        var newArr = arr.filter(callbackfn);

        return newArr.length === 3 && newArr[1] === 6.99;
    }
runTestCase(testcase);