/// 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. /** * @path ch11/11.13/11.13.2/11.13.2-25-s.js * @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} * @onlyStrict */ function testcase() { "use strict"; var obj = {}; Object.defineProperty(obj, "prop", { value: 10, writable: false, enumerable: true, configurable: true }); try { obj.prop %= 20; return false; } catch (e) { return e instanceof TypeError && obj.prop === 10; } } runTestCase(testcase);