tor-browser

The Tor Browser
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set-access-of-missing-private-setter.js (1297B)

      1 // Copyright (C) 2019 Caio Lima (Igalia SL). All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 description: Trying to set a private member without setter throws TypeError
      6 esid: sec-privatefieldset
      7 info: |
      8  PrivateFieldSet ( P, O, value )
      9    1. Assert: P is a Private Name.
     10    2. If O is not an object, throw a TypeError exception.
     11    3. If P.[[Kind]] is "field",
     12      a. Let entry be PrivateFieldFind(P, O).
     13      b. If entry is empty, throw a TypeError exception.
     14      c. Set entry.[[PrivateFieldValue]] to value.
     15      d. Return.
     16    4. If P.[[Kind]] is "method", throw a TypeError exception.
     17    5. Else,
     18      a. Assert: P.[[Kind]] is "accessor".
     19      b. If O.[[PrivateFieldBrands]] does not contain P.[[Brand]], throw a TypeError exception.
     20      c. If P does not have a [[Set]] field, throw a TypeError exception.
     21      d. Let setter be P.[[Set]].
     22      e. Perform ? Call(setter, O, value).
     23      f. Return.
     24 features: [class-methods-private, class]
     25 ---*/
     26 
     27 class C {
     28  get #f() {
     29    throw new Test262Error();
     30  }
     31 
     32  setAccess() {
     33    this.#f = 'Test262';
     34  }
     35 }
     36 
     37 let c = new C();
     38 assert.throws(TypeError, function() {
     39  c.setAccess();
     40 }, 'set operation on private accessor without setter should throw TypeError');
     41 
     42 reportCompare(0, 0);