trap-is-missing-target-is-proxy.js (1069B)
1 // Copyright (C) 2020 Alexey Shvayka. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 esid: sec-proxy-object-internal-methods-and-internal-slots-hasproperty-p 6 description: > 7 If "has" trap is null or undefined, [[HasProperty]] call is properly 8 forwarded to [[ProxyTarget]] (which is also a Proxy object). 9 info: | 10 [[HasProperty]] ( P ) 11 12 [...] 13 5. Let target be O.[[ProxyTarget]]. 14 6. Let trap be ? GetMethod(handler, "has"). 15 7. If trap is undefined, then 16 a. Return ? target.[[HasProperty]](P). 17 features: [Proxy, Symbol.replace, Reflect] 18 ---*/ 19 20 var regExp = /(?:)/m; 21 var regExpTarget = new Proxy(regExp, {}); 22 var regExpProxy = new Proxy(regExpTarget, {}); 23 24 assert(Reflect.has(regExpProxy, "ignoreCase")); 25 assert(Symbol.replace in regExpProxy); 26 assert("lastIndex" in Object.create(regExpProxy)); 27 28 29 var functionTarget = new Proxy(function() {}, {}); 30 var functionProxy = new Proxy(functionTarget, {}); 31 32 assert("name" in functionProxy); 33 assert("length" in Object.create(functionProxy)); 34 35 reportCompare(0, 0);