mirror of https://github.com/tc39/test262.git
49 lines
1.5 KiB
JavaScript
49 lines
1.5 KiB
JavaScript
|
// 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.
|
||
|
|
|
||
|
|
/*---
|
||
|
|
info: >
|
||
|
|
Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
|
||
|
|
of O to define the property. For non-configurable properties, step 11.a.ii
|
||
|
|
of [[DefineOwnProperty]] rejects changing the getter if present.
|
||
|
|
es5id: 15.2.3.6-4-20
|
||
|
|
description: >
|
||
|
|
Object.defineProperty throws TypeError when changing getter (if
|
||
|
|
present) of non-configurable accessor properties(8.12.9 step
|
||
|
|
11.a.ii)
|
||
|
|
includes: [runTestCase.js]
|
||
|
|
---*/
|
||
|
|
|
||
|
|
function testcase() {
|
||
|
|
var o = {};
|
||
|
|
|
||
|
|
// create an accessor property; all other attributes default to false.
|
||
|
|
// dummy getter/setter
|
||
|
|
var getter = function () { return 1;}
|
||
|
|
var d1 = { get: getter, configurable: false };
|
||
|
|
Object.defineProperty(o, "foo", d1);
|
||
|
|
|
||
|
|
// now, trying to change the setter should fail, since [[Configurable]]
|
||
|
|
// on the original property will be false.
|
||
|
|
var desc = { get: undefined };
|
||
|
|
|
||
|
|
try {
|
||
|
|
Object.defineProperty(o, "foo", desc);
|
||
|
|
}
|
||
|
|
catch (e) {
|
||
|
|
if (e instanceof TypeError) {
|
||
|
|
var d2 = Object.getOwnPropertyDescriptor(o, "foo");
|
||
|
|
|
||
|
|
if (d2.get === getter &&
|
||
|
|
d2.configurable === false &&
|
||
|
|
d2.enumerable === false) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
runTestCase(testcase);
|