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/// 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.
/**
* Step 4 of defineProperty calls the [[DefineOwnProperty]] internal method
* of O to define the property. Step 6 of [[DefineOwnProperty]] returns if
* every field of desc also occurs in current and every field in desc has
* the same value as current.
*
* @path ch15/15.2/15.2.3/15.2.3.6/15.2.3.6-4-6.js
* @description Object.defineProperty is no-op if current and desc are the same accessor desc
*/
function testcase() {
function sameAccessorDescriptorValues(d1, d2) {
return (d1.get == d2.get &&
d1.enumerable == d2.enumerable &&
d1.configurable == d2.configurable);
}
var o = {};
// create an accessor property with the following attributes:
// enumerable: true, configurable: true
var desc = {
get: function () {},
enumerable: true,
configurable: true
};
Object.defineProperty(o, "foo", desc);
// query for, and save, the desc. A subsequent call to defineProperty
// with the same desc should not disturb the property definition.
var d1 = Object.getOwnPropertyDescriptor(o, "foo");
// now, redefine the property with the same descriptor
// the property defintion should not get disturbed.
Object.defineProperty(o, "foo", desc);
var d2 = Object.getOwnPropertyDescriptor(o, "foo");
if (sameAccessorDescriptorValues(d1, d2) === true) {
return true;
}
}
runTestCase(testcase);
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