test262/test/language/arguments-object/10.6-11-b-1.js

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

/*---
es5id: 10.6-11-b-1
description: >
    Arguments Object has index property '0' as its own property, it
    shoulde be writable, enumerable, configurable and does not invoke
    the setter defined on Object.prototype[0] (Step 11.b)
---*/

            var data = "data";
            var getFunc = function () {
                return data;
            };

            var setFunc = function (value) {
                data = value;
            };

            Object.defineProperty(Object.prototype, "0", {
                get: getFunc,
                set: setFunc,
                configurable: true
            });

            var argObj = (function () { return arguments })(1);

            var verifyValue = false;
            verifyValue = (argObj[0] === 1);

            var verifyEnumerable = false;
            for (var p in argObj) {
                if (p === "0" && argObj.hasOwnProperty("0")) {
                    verifyEnumerable = true;
                }
            }

            var verifyWritable = false;
            argObj[0] = 1001;
            verifyWritable = (argObj[0] === 1001);

            var verifyConfigurable = false;
            delete argObj[0];
            verifyConfigurable = argObj.hasOwnProperty("0");

assert(verifyValue, 'verifyValue !== true');
assert(verifyWritable, 'verifyWritable !== true');
assert(verifyEnumerable, 'verifyEnumerable !== true');
assert.sameValue(verifyConfigurable, false, 'verifyConfigurable');
assert.sameValue(data, "data", 'data');