tor-browser

The Tor Browser
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trap-is-undefined-target-is-proxy.js (961B)

      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-call-thisargument-argumentslist
      6 description: >
      7  If "apply" trap is null or undefined, [[Call]] is properly
      8  forwarded to [[ProxyTarget]] (which is also a Proxy object).
      9 info: |
     10  [[Call]] ( thisArgument, argumentsList )
     11 
     12  [...]
     13  4. Let target be O.[[ProxyTarget]].
     14  5. Let trap be ? GetMethod(handler, "apply").
     15  6. If trap is undefined, then
     16    a. Return ? Call(target, thisArgument, argumentsList).
     17 features: [generators, Proxy, Reflect]
     18 includes: [compareArray.js]
     19 ---*/
     20 
     21 var sum = function* (arg) {
     22  yield this.foo;
     23  yield arg;
     24 };
     25 
     26 var sumTarget = new Proxy(sum, {});
     27 var sumProxy = new Proxy(sumTarget, {
     28  apply: undefined,
     29 });
     30 
     31 var gen = Reflect.apply(sumProxy, {foo: 10}, [1]);
     32 
     33 assert.compareArray(Array.from(gen), [10, 1]);
     34 
     35 reportCompare(0, 0);