tor-browser

The Tor Browser
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private-method-double-initialisation-set.js (763B)

      1 // Copyright (C) 2021 André Bargull. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: >
      6  Throws TypeError when attempting to install private methods multiple times.
      7 esid: sec-privatemethodoraccessoradd
      8 info: |
      9  7.3.28 PrivateMethodOrAccessorAdd ( method, O )
     10    1. Assert: method.[[Kind]] is either method or accessor.
     11    2. Let entry be ! PrivateElementFind(method.[[Key]], O).
     12    3. If entry is not empty, throw a TypeError exception.
     13    ...
     14 
     15 features: [class, class-methods-private]
     16 ---*/
     17 
     18 class Base {
     19  constructor(o) {
     20    return o;
     21  }
     22 }
     23 
     24 class C extends Base {
     25  set #p(x) {}
     26 }
     27 
     28 var obj = {};
     29 
     30 new C(obj);
     31 
     32 assert.throws(TypeError, function() {
     33  new C(obj);
     34 });
     35 
     36 reportCompare(0, 0);