46e944dbad
These tests make sure the ticks are correct when resolving against a Promise. Without the optimization, the result is: "start,tick 1,tick 2,tick 3,tick 4,done,tick 5" With the optimization, the result is: "start,tick 1,tick 2,done,tick 3,tick 4,tick 5" Bug: v8:8267 Change-Id: I6c6499c7c256927531a99bab4ae1c5bd5069ef7c Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1534884 Reviewed-by: Maya Lekova <mslekova@chromium.org> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org> Cr-Commit-Position: refs/heads/master@{#60615}
34 lines
843 B
JavaScript
34 lines
843 B
JavaScript
// Copyright 2019 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Flags: --allow-natives-syntax
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const actual = [];
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function createIterator() {
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return {
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[Symbol.iterator]() { return this; },
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next() {
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return { value: Promise.resolve(1), done: true};
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}
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};
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}
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actual.push("start");
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iter = %CreateAsyncFromSyncIterator(createIterator());
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Promise.resolve(0)
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.then(() => actual.push("tick 1"))
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.then(() => actual.push("tick 2"))
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.then(() => actual.push("tick 3"))
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.then(() => actual.push("tick 4"))
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.then(() => actual.push("tick 5"));
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let p = iter.next();
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p.then(_ => { actual.push("done"); } );
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%PerformMicrotaskCheckpoint();
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assertSame("start,tick 1,tick 2,done,tick 3,tick 4,tick 5", actual.join(","))
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