mirror of https://github.com/tc39/test262.git
42 lines
1.1 KiB
JavaScript
42 lines
1.1 KiB
JavaScript
|
// Copyright (C) 2020 Alexey 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-delete-p
|
||
|
|
description: >
|
||
|
|
If "deleteProperty" trap is null or undefined, [[Delete]] call is
|
||
|
|
properly forwarded to [[ProxyTarget]] (which is also a Proxy object).
|
||
|
|
info: |
|
||
|
|
[[Delete]] ( P )
|
||
|
|
|
||
|
|
[...]
|
||
|
|
5. Let target be O.[[ProxyTarget]].
|
||
|
|
6. Let trap be ? GetMethod(handler, "deleteProperty").
|
||
|
|
7. If trap is undefined, then
|
||
|
|
a. Return ? target.[[Delete]](P).
|
||
|
|
features: [Proxy, Reflect]
|
||
|
|
---*/
|
||
|
|
|
||
|
|
var stringTarget = new Proxy(new String("str"), {});
|
||
|
|
var stringProxy = new Proxy(stringTarget, {
|
||
|
|
deleteProperty: null,
|
||
|
|
});
|
||
|
|
|
||
|
|
assert(!Reflect.deleteProperty(stringProxy, "length"));
|
||
|
|
assert.throws(TypeError, function() {
|
||
|
|
"use strict";
|
||
|
|
delete stringProxy[0];
|
||
|
|
});
|
||
|
|
|
||
|
|
|
||
|
|
var regExpTarget = new Proxy(/(?:)/g, {});
|
||
|
|
var regExpProxy = new Proxy(regExpTarget, {
|
||
|
|
deleteProperty: null,
|
||
|
|
});
|
||
|
|
|
||
|
|
assert(delete regExpProxy.foo);
|
||
|
|
assert.throws(TypeError, function() {
|
||
|
|
"use strict";
|
||
|
|
delete regExpProxy.lastIndex;
|
||
|
|
});
|