// Copyright JS Foundation and other contributors, http://js.foundation // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. var object = {}; Object.defineProperties(object, { a: { value: "foo", enumerable: false }, b: { value: "bar", enumerable: true, writable: false } }); var proxy = new Proxy(object, { getOwnPropertyDescriptor: function(o, v) { handlers.push("D"); return Object.getOwnPropertyDescriptor(o, v); }, get: function(o, v) { handlers.push("G"); return o[v]; } }); var handlers = []; var keys = Object.keys(proxy); assert(keys.length === 1); assert(keys[0] === "b"); assert(handlers.length === 2); assert(handlers.toString() === "D,D");