tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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async-iterable-async-mapped-awaits-once.js (778B)

      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  Async-iterable awaits each input once with mapping callback
      9 includes: [asyncHelpers.js]
     10 flags: [async]
     11 features: [Array.fromAsync]
     12 ---*/
     13 
     14 asyncTest(async function () {
     15  async function* generateInput () {
     16    yield* [ 0, 1, 2 ];
     17  }
     18  const input = generateInput();
     19  let awaitCounter = 0;
     20  await Array.fromAsync(input, v => {
     21    return {
     22      // This “then” method should occur three times:
     23      // one for each value from the input.
     24      then (resolve, reject) {
     25        awaitCounter ++;
     26        resolve(v);
     27      },
     28    };
     29  });
     30  assert.sameValue(awaitCounter, 3);
     31 });