mirror of
https://github.com/tc39/test262.git
synced 2025-11-04 05:33:50 +01:00
7298a38552
sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
62 lines
2.4 KiB
JavaScript
62 lines
2.4 KiB
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following
|
|
// disclaimer in the documentation and/or other materials provided
|
|
// with the distribution.
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
// contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
// Check for correct interleaving of Promises and async/await
|
|
(function () {
|
|
const iterations = 10;
|
|
let promiseCounter = iterations;
|
|
let awaitCounter = 0;
|
|
|
|
async function check(v) {
|
|
awaitCounter = v;
|
|
// The following checks ensure that "await" takes 3 ticks on the
|
|
// microtask queue. Note: this will change in the future
|
|
if (awaitCounter === 0) {
|
|
assertEquals(iterations, promiseCounter);
|
|
} else if (awaitCounter <= Math.floor(iterations / 3)) {
|
|
assertEquals(iterations - awaitCounter * 3, promiseCounter);
|
|
} else {
|
|
assertEquals(0, promiseCounter);
|
|
}
|
|
}
|
|
|
|
async function f() {
|
|
for (let i = 0; i < iterations; i++) {
|
|
await check(i);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
function countdown(v) {
|
|
promiseCounter = v;
|
|
if (v > 0) Promise.resolve(v - 1).then(countdown);
|
|
}
|
|
|
|
countdown(iterations);
|
|
f();
|
|
})();
|