/// 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); |