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// 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 plainObject = {
get foo() {},
};
Object.defineProperty(plainObject, "bar", {
configurable: false,
});
var plainObjectTarget = new Proxy(plainObject, {});
var plainObjectProxy = new Proxy(plainObjectTarget, {});
assert(delete plainObjectProxy.foo);
assert(
!Object.prototype.hasOwnProperty.call(plainObject, "foo"),
"'foo' property was deleted from original object"
);
assert(!Reflect.deleteProperty(plainObjectProxy, "bar"));
assert(
Object.prototype.hasOwnProperty.call(plainObject, "bar"),
"'bar' property was not deleted from original object"
);
var func = function() {};
var funcTarget = new Proxy(func, {});
var funcProxy = new Proxy(funcTarget, {});
assert(delete funcProxy.length);
assert(
!Object.prototype.hasOwnProperty.call(func, "length"),
"'length' property was deleted from original object"
);
assert.throws(TypeError, function() {
"use strict";
delete funcProxy.prototype;
});
reportCompare(0, 0);
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