// 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-hasproperty-p description: > If "has" trap is null or undefined, [[HasProperty]] call is properly forwarded to [[ProxyTarget]] (which is also a Proxy object). info: | [[HasProperty]] ( P ) [...] 5. Let target be O.[[ProxyTarget]]. 6. Let trap be ? GetMethod(handler, "has"). 7. If trap is undefined, then a. Return ? target.[[HasProperty]](P). features: [Proxy, Symbol, Reflect, Array.prototype.includes] ---*/ var stringTarget = new Proxy(new String("str"), {}); var stringProxy = new Proxy(stringTarget, { get: null, }); assert(Reflect.has(stringProxy, "length")); assert(0 in stringProxy); assert(!(4 in stringProxy)); var sym = Symbol(); var target = new Proxy({}, { has: function(_target, key) { return [sym, "6", "foo"].includes(key); }, }); var proxy = new Proxy(target, { get: null, }); assert(Reflect.has(proxy, sym)); assert("6" in proxy); assert("foo" in Object.create(proxy)); assert(!("bar" in proxy)); reportCompare(0, 0);