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31 lines
1.1 KiB
JavaScript
31 lines
1.1 KiB
JavaScript
/// Copyright (c) 2012 Ecma International. All rights reserved.
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/// Ecma International makes this code available under the terms and conditions set
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/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
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/// "Use Terms"). Any redistribution of this code must retain the above
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/// copyright and this notice and otherwise comply with the Use Terms.
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/**
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* @path ch11/11.13/11.13.2/11.13.2-26-s.js
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* @description Strict Mode - TypeError is thrown if The LeftHandSide of a Compound Assignment operator(+=) is a reference to a data property with the attribute value {[[Writable]]:false}
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* @onlyStrict
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*/
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function testcase() {
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"use strict";
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var obj = {};
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Object.defineProperty(obj, "prop", {
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value: 10,
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writable: false,
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enumerable: true,
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configurable: true
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});
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try {
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obj.prop += 20;
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return false;
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} catch (e) {
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return e instanceof TypeError && obj.prop === 10;
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}
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}
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runTestCase(testcase);
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