tor-browser

The Tor Browser
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non-iterable-with-thenable-async-mapped-awaits-once.js (742B)

      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  Non-iterable input with thenables awaits each input once without mapping callback
      9 includes: [asyncHelpers.js]
     10 flags: [async]
     11 features: [Array.fromAsync]
     12 ---*/
     13 
     14 asyncTest(async function () {
     15  const expectedValue = {};
     16  const expected = [ expectedValue ];
     17  let awaitCounter = 0;
     18  const inputThenable = {
     19    then (resolve, reject) {
     20      awaitCounter++;
     21      resolve(expectedValue);
     22    },
     23  };
     24  const input = {
     25    length: 1,
     26    0: inputThenable,
     27  };
     28  await Array.fromAsync(input, async v => v);
     29  assert.sameValue(awaitCounter, 1);
     30 });