test262/test/built-ins/Object/defineProperty/15.2.3.6-4-379.js

37 lines
1.1 KiB
JavaScript

// Copyright (c) 2012 Ecma International. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es5id: 15.2.3.6-4-379
description: >
ES5 Attributes - fail to update [[Enumerable]] attribute of data
property ([[Writable]] is false, [[Enumerable]] is false,
[[Configurable]] is false) to different value
includes: [runTestCase.js]
---*/
function testcase() {
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");
try {
Object.defineProperty(obj, "prop", {
enumerable: true
});
return false;
} catch (e) {
var desc2 = Object.getOwnPropertyDescriptor(obj, "prop");
return propertyDefineCorrect && desc1.enumerable === false && obj.prop === 2010 && desc2.enumerable === false && e instanceof TypeError;
}
}
runTestCase(testcase);