load(libdir + "asserts.js"); | |
/* | |
* Throw a TypeError if the current descriptor is non-configurable and the trap | |
* returns a configurable descriptor | |
*/ | |
var target = {}; | |
Object.defineProperty(target, 'foo', { | |
configurable: false | |
}); | |
assertThrowsInstanceOf(function () { | |
Object.getOwnPropertyDescriptor(Proxy(target, { | |
getOwnPropertyDescriptor: function (target, name) { | |
return { | |
configurable: true | |
}; | |
} | |
}), 'foo'); | |
}, TypeError); |