tor-browser

The Tor Browser
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asyncitems-arraylike-holes.js (738B)

      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: Array-like object with holes treats the holes as undefined
      8 info: |
      9  3.k.vii.2. Let _kValue_ be ? Get(_arrayLike_, _Pk_).
     10 features: [Array.fromAsync]
     11 flags: [async]
     12 includes: [asyncHelpers.js, compareArray.js]
     13 ---*/
     14 
     15 asyncTest(async function () {
     16  const arrayLike = Object.create(null);
     17  arrayLike.length = 5;
     18  arrayLike[0] = 0;
     19  arrayLike[1] = 1;
     20  arrayLike[2] = 2;
     21  arrayLike[4] = 4;
     22 
     23  const array = await Array.fromAsync(arrayLike);
     24  assert.compareArray(array, [0, 1, 2, undefined, 4], "holes in array-like treated as undefined");
     25 });