tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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async-generator-interleaved.js (1021B)

      1 // |reftest| async
      2 // Copyright 2018 the V8 project authors. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 
      5 /*---
      6 author: Maya Lekova <mslekova@chromium.org>
      7 esid: await
      8 description: >
      9  Await on async generator functions and builtin Promises are properly
     10  interleaved, meaning await takes only 1 tick on the microtask queue.
     11 flags: [async]
     12 features: [async-functions, async-iteration]
     13 includes: [compareArray.js]
     14 ---*/
     15 
     16 const actual = [];
     17 const expected = [ 'await', 1, 'await', 2 ];
     18 const iterations = 2;
     19 
     20 async function pushAwait() {
     21  actual.push('await');
     22 }
     23 
     24 async function* callAsync() {
     25  for (let i = 0; i < iterations; i++) {
     26    await pushAwait();
     27  }
     28  return 0;
     29 }
     30 
     31 function checkAssertions() {
     32  assert.compareArray(actual, expected,
     33    'Async/await and promises should be interleaved');
     34 }
     35 
     36 callAsync().next();
     37 
     38 new Promise(function (resolve) {
     39  actual.push(1);
     40  resolve();
     41 }).then(function () {
     42  actual.push(2);
     43 }).then(checkAssertions).then($DONE, $DONE);