mirror of https://github.com/tc39/test262.git
45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
// Copyright (c) 2012 Ecma International. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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info: >
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Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
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of O to define the property. For non-configurable properties, step 9a of
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[[DefineOwnProperty]] rejects changing the kind of a property.
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es5id: 15.2.3.6-4-13
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description: >
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Object.defineProperty throws TypeError when changing
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non-configurable accessor properties to data properties
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includes: [runTestCase.js]
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---*/
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function testcase() {
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var o = {};
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// create an accessor property; all other attributes default to false.
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// dummy getter
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var getter = function () { return 1; }
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var d1 = { get: getter, configurable: false };
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Object.defineProperty(o, "foo", d1);
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// changing "foo" to be a data property should fail, since [[Configurable]]
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// on the original property will be false.
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var desc = { value: 101 };
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try {
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Object.defineProperty(o, "foo", desc);
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}
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catch (e) {
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if (e instanceof TypeError) {
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// the property should remain an accessor property.
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var d2 = Object.getOwnPropertyDescriptor(o, "foo");
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if (d2.get === getter &&
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d2.configurable === false) {
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return true;
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}
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}
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}
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}
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runTestCase(testcase);
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