mirror of https://github.com/tc39/test262.git
41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
// Copyright (C) 2019 Aleksey Shvayka. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
/*---
|
|
esid: sec-proxy-object-internal-methods-and-internal-slots-getownproperty-p
|
|
description: >
|
|
Throws a TypeError exception if resultDesc is both non-configurable and
|
|
non-writable, while targetDesc is writable.
|
|
info: |
|
|
[[GetOwnProperty]] (P)
|
|
|
|
...
|
|
17. If resultDesc.[[Configurable]] is false, then
|
|
...
|
|
b. If resultDesc has a [[Writable]] field and resultDesc.[[Writable]] is
|
|
false, then
|
|
i. If targetDesc.[[Writable]] is true, throw a TypeError exception.
|
|
...
|
|
features: [Proxy, proxy-missing-checks]
|
|
---*/
|
|
|
|
var trapCalls = 0;
|
|
var p = new Proxy({}, {
|
|
getOwnPropertyDescriptor: function(t, prop) {
|
|
Object.defineProperty(t, prop, {
|
|
configurable: false,
|
|
writable: true,
|
|
});
|
|
|
|
trapCalls++;
|
|
return {
|
|
configurable: false,
|
|
writable: false,
|
|
};
|
|
},
|
|
});
|
|
|
|
assert.throws(TypeError, function() {
|
|
Object.getOwnPropertyDescriptor(p, "prop");
|
|
});
|
|
assert.sameValue(trapCalls, 1);
|