test/suite/ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-4-15.js


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/// 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.
/**
 * @path ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-4-15.js
 * @description Array.prototype.reduce - calling with no callbackfn is the same as passing undefined for callbackfn
 */


function testcase() {
        var obj = { 10: 10 };
        var lengthAccessed = false;
        var loopAccessed = false;

        Object.defineProperty(obj, "length", {
            get: function () {
                lengthAccessed = true;
                return 20;
            },
            configurable: true
        });

        Object.defineProperty(obj, "0", {
            get: function () {
                loopAccessed = true;
                return 10;
            },
            configurable: true
        });

        try {
            Array.prototype.reduce.call(obj);
            return false;
        } catch (ex) {
            return (ex instanceof TypeError) && lengthAccessed && !loopAccessed;
        }
    }
runTestCase(testcase);