| // 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-getownproperty-p |
| description: > |
| If "getOwnPropertyDescriptor" trap is null or undefined, [[GetOwnProperty]] |
| call is properly forwarded to [[ProxyTarget]] (which is also a Proxy object). |
| info: | |
| [[GetOwnProperty]] ( P ) |
| |
| [...] |
| 5. Let target be O.[[ProxyTarget]]. |
| 6. Let trap be ? GetMethod(handler, "getOwnPropertyDescriptor"). |
| 7. If trap is undefined, then |
| a. Return ? target.[[GetOwnProperty]](P). |
| includes: [propertyHelper.js] |
| features: [Proxy] |
| ---*/ |
| |
| var plainObjectTarget = new Proxy({foo: 1}, {}); |
| var plainObjectProxy = new Proxy(plainObjectTarget, { |
| getOwnPropertyDescriptor: null, |
| }); |
| |
| verifyProperty(plainObjectProxy, "bar", undefined); |
| verifyProperty(plainObjectProxy, "foo", { |
| value: 1, |
| writable: true, |
| enumerable: true, |
| configurable: true, |
| }); |
| |
| |
| var fooDescriptor = { |
| get: function() {}, |
| set: function(_value) {}, |
| enumerable: false, |
| configurable: true, |
| }; |
| |
| var target = new Proxy({}, { |
| getOwnPropertyDescriptor: function(_target, key) { |
| if (key === "foo") { |
| return fooDescriptor; |
| } |
| }, |
| deleteProperty: function(_target, key) { |
| if (key === "foo") { |
| fooDescriptor = undefined; |
| } |
| |
| return true; |
| }, |
| }); |
| |
| var proxy = new Proxy(target, { |
| getOwnPropertyDescriptor: null, |
| }); |
| |
| verifyProperty(proxy, "bar", undefined); |
| verifyProperty(proxy, "foo", fooDescriptor); |