tor-browser

The Tor Browser
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asyncitems-object-not-arraylike.js (729B)

      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  Treats an asyncItems object that isn't an array-like as a 0-length array-like
      9 info: |
     10  3.k.iii. Let _len_ be ? LengthOfArrayLike(_arrayLike_).
     11 features: [Array.fromAsync]
     12 flags: [async]
     13 includes: [asyncHelpers.js, compareArray.js]
     14 ---*/
     15 
     16 asyncTest(async function () {
     17  const notArrayLike = Object.create(null);
     18  notArrayLike[0] = 0;
     19  notArrayLike[1] = 1;
     20  notArrayLike[2] = 2;
     21 
     22  const array = await Array.fromAsync(notArrayLike);
     23  assert.compareArray(array, [], "non-array-like object is treated as 0-length array-like");
     24 });