tor-browser

The Tor Browser
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asyncitems-arraylike-length-accessor-throws.js (833B)

      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: Rejects on array-like object whose length cannot be gotten
      8 info: |
      9  3.k.iii. Let _len_ be ? LengthOfArrayLike(_arrayLike_).
     10 features: [Array.fromAsync]
     11 flags: [async]
     12 includes: [asyncHelpers.js]
     13 ---*/
     14 
     15 asyncTest(async function () {
     16  await assert.throwsAsync(Test262Error, () => Array.fromAsync({
     17    get length() {
     18      throw new Test262Error('accessing length property fails');
     19    }
     20  }), "Promise should be rejected if array-like length getter throws");
     21 
     22  await assert.throwsAsync(TypeError, () => Array.fromAsync({
     23    length: 1n,
     24    0: 0
     25  }), "Promise should be rejected if array-like length can't be converted to a number");
     26 });