test262/test/built-ins/Object/defineProperties/15.2.3.7-6-a-115.js

// 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.

/*---
es5id: 15.2.3.7-6-a-115
description: >
    Object.defineProperties - 'O' is an Array, 'P' is the length
    property of 'O', the [[Value]] field of 'desc' is absent, test
    every field in 'desc' is same with corresponding attribute value
    of the length property in 'O' (15.4.5.1 step 3.a.i)
includes: [runTestCase.js]
---*/

function testcase() {
        var arr = [];

        Object.defineProperties(arr, {
            length: {
                writable: true,
                enumerable: false,
                configurable: false
            }
        });

        var verifyValue = false;
        verifyValue = (arr.length === 0);

        var verifyWritable = false;
        arr.length = 2;
        verifyWritable = (arr.length === 2);

        var verifyEnumerable = false;
        for (var p in arr) {
            if (p === "length") {
                verifyEnumerable = true;
            }
        }

        var verifyConfigurable = false;
        delete arr.length;
        verifyConfigurable = arr.hasOwnProperty("length");

        return verifyValue && verifyWritable && !verifyEnumerable && verifyConfigurable;
    }
runTestCase(testcase);