test/built-ins/Object/defineProperties/15.2.3.7-6-a-240.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-240
description: >
    Object.defineProperties - TypeError is thrown if 'O' is an Array,
    'P' is an array index named property that already exists on 'O' is
    data property with  [[Configurable]], [[Writable]] false, 'desc'
    is data descriptor, [[Value]] field of 'desc' and the [[Value]]
    attribute value of 'P' are two objects which refer to the
    different objects (15.4.5.1 step 4.c)
includes: [propertyHelper.js]
---*/

var arr = [];
var obj1 = { value: 12 };
var obj2 = { value: 36 };

Object.defineProperty(arr, "1", {
    value: obj1
});

try {
    Object.defineProperties(arr, {
        "1": {
            value: obj2
        }
    });

    $ERROR("Expected an exception.");
} catch (e) {
    verifyEqualTo(arr, "1", obj1);

    verifyNotWritable(arr, "1");

    verifyNotEnumerable(arr, "1");

    verifyNotConfigurable(arr, "1");

    if (!(e instanceof TypeError)) {
        $ERROR("Expected TypeError, got " + e);
    }

}