tor-browser

The Tor Browser
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this-constructor-with-bad-length-setter.js (978B)

      1 // |reftest| async
      2 // Copyright (C) 2023 Igalia, S.L. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 
      5 /*---
      6 esid: sec-array.fromasync
      7 description: >
      8  Rejects the promise if setting the length fails on an instance of a custom
      9  this-value
     10 info: |
     11  3.j.ii.4.a. Perform ? Set(_A_, *"length"*, 𝔽(_k_), *true*).
     12  ...
     13  3.k.viii. Perform ? Set(_A_, *"length"*, 𝔽(_len_), *true*)
     14 includes: [asyncHelpers.js]
     15 flags: [async]
     16 features: [Array.fromAsync]
     17 ---*/
     18 
     19 asyncTest(async function () {
     20  class MyArray {
     21    set length(v) {
     22      throw new Test262Error("setter of length property throws")
     23    }
     24  }
     25 
     26  await assert.throwsAsync(Test262Error, () => Array.fromAsync.call(MyArray, [0, 1, 2]), "Promise rejected if setting length fails");
     27 
     28  await assert.throwsAsync(Test262Error, () => Array.fromAsync.call(MyArray, {
     29    length: 3,
     30    0: 0,
     31    1: 1,
     32    2: 2
     33  }), "Promise rejected if setting length from array-like fails");
     34 });