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24 lines
848 B
JavaScript
24 lines
848 B
JavaScript
// Copyright 2018 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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var log = "";
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var result;
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Promise.resolve()
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.then(() => log += "|turn1")
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.then(() => log += "|turn2")
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.then(() => log += "|turn3")
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.then(() => log += "|turn4")
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.then(() => result = "|start|turn1|fast-resolve|turn2|turn3|slow-resolve|turn4\n"+log)
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.catch(e => print("ERROR", e));
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Promise.resolve(Promise.resolve()).then(() => log += "|fast-resolve");
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(class extends Promise {}).resolve(Promise.resolve()).then(() => log += "|slow-resolve");
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log += "|start";
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%PerformMicrotaskCheckpoint();
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assertEquals("|start|turn1|fast-resolve|turn2|turn3|slow-resolve|turn4\n\
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|start|turn1|fast-resolve|turn2|turn3|slow-resolve|turn4", result);
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