test/built-ins/Object/defineProperties/15.2.3.7-6-a-119.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: 15.2.3.7-6-a-119
description: >
    Object.defineProperties - 'O' is an Array, 'P' is the length
    property of 'O', the [[Value]] field of 'desc' is absent, test
    TypeError is thrown when updating the [[Writable]] attribute of
    the length property from false to true (15.4.5.1 step 3.a.i)
includes: [runTestCase.js]
---*/

function testcase() {

        var arr = [];

        Object.defineProperty(arr, "length", {
            writable: false
        });

        try {
            Object.defineProperties(arr, { 
                length: { writable: true } 
            });

            return false;
        } catch (e) {
            return (e instanceof TypeError);
        }
    }
runTestCase(testcase);