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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: 15.2.3.6-4-378
description: >
ES5 Attributes - fail to update [[Writable]] attribute of data
property ([[Writable]] is false, [[Enumerable]] is false,
[[Configurable]] is false) to different value
---*/
var obj = {};
Object.defineProperty(obj, "prop", {
value: 2010,
writable: false,
enumerable: false,
configurable: false
});
var propertyDefineCorrect = obj.hasOwnProperty("prop");
var desc1 = Object.getOwnPropertyDescriptor(obj, "prop");
assert.throws(TypeError, function() {
Object.defineProperty(obj, "prop", {
writable: true
});
});
var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
assert(propertyDefineCorrect, 'propertyDefineCorrect !== true');
assert.sameValue(desc1.writable, false, 'desc1.writable');
assert.sameValue(obj.prop, 2010, 'obj.prop');
assert.sameValue(desc2.writable, false, 'desc2.writable');
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