test/built-ins/Array/prototype/reduce/15.4.4.21-9-b-8.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: 15.4.4.21-9-b-8
description: >
    Array.prototype.reduce - deleting own property in step 8 causes
    deleted index property not to be visited on an Array-like object
includes: [runTestCase.js]
---*/

function testcase() {

        var accessed = false;
        var testResult = true;

        function callbackfn(accum, val, idx, obj) {
            accessed = true;
            if (idx === 1) {
                testResult = false;
            }
        }

        var obj = { 5: 10, length: 10 };

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

        Object.defineProperty(obj, "0", {
            get: function () {
                delete obj[1];
                return 0;
            },
            configurable: true
        });

        Array.prototype.reduce.call(obj, callbackfn);
        return testResult && accessed;
    }
runTestCase(testcase);