/// 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 ch08/8.12/8.12.5/8.12.5-3-b_1.js * @description Changing the value of a data property should not affect it's non-value property descriptor attributes. */ function testcase() { var origReduce = Array.prototype.reduce; var origDesc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce"); var newDesc; try { Array.prototype.reduce = function () {;}; newDesc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce"); var descArray = [origDesc, newDesc]; for (var j in descArray) { //Ensure no attributes are magically added to newDesc for (var i in descArray[j]) { if (i==="value") { if (origDesc[i]===newDesc[i]) { return false; } } else if (origDesc[i]!==newDesc[i]) { return false; } } } return true; } finally { Array.prototype.reduce = origReduce; } } runTestCase(testcase);