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// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 9.5.5
description: >
Throws a TypeError exception if trap result is not configurable but target
property descriptor is undefined.
info: |
[[GetOwnProperty]] (P)
...
2. Let handler be the value of the [[ProxyHandler]] internal slot of O.
...
5. Let target be the value of the [[ProxyTarget]] internal slot of O.
6. Let trap be GetMethod(handler, "getOwnPropertyDescriptor").
...
9. Let trapResultObj be Call(trap, handler, «target, P»).
...
12. Let targetDesc be target.[[GetOwnProperty]](P).
...
17. Let resultDesc be ToPropertyDescriptor(trapResultObj).
...
22. If resultDesc.[[Configurable]] is false, then
a. If targetDesc is undefined or targetDesc.[[Configurable]] is true, then
i. Throw a TypeError exception.
features: [Proxy]
---*/
var target = {};
var p = new Proxy(target, {
getOwnPropertyDescriptor: function(t, prop) {
var foo = {};
Object.defineProperty(foo, "bar", {
configurable: false,
enumerable: true,
value: 1
});
return Object.getOwnPropertyDescriptor(foo, prop);
}
});
assert.throws(TypeError, function() {
Object.getOwnPropertyDescriptor(p, "bar");
});
reportCompare(0, 0);
|
