38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
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// Copyright 2021 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: --shared-string-table --allow-natives-syntax
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if (this.Worker) {
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(function TestSharedStringPostMessage() {
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let workerScript =
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`postMessage("started");
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onmessage = function(str) {
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if (!%IsSharedString(str)) {
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throw new Error("str isn't shared");
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}
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postMessage(str);
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};`;
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let worker = new Worker(workerScript, { type: 'string' });
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let started = worker.getMessage();
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assertTrue(%IsSharedString(started));
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assertEquals("started", started);
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// The string literal appears in source and is internalized, so should
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// already be shared.
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let str_to_send = 'foo';
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assertTrue(%IsSharedString(str_to_send));
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worker.postMessage(str_to_send);
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let str_received = worker.getMessage();
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assertTrue(%IsSharedString(str_received));
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// Object.is and === won't check pointer equality of Strings.
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assertTrue(%IsSameHeapObject(str_to_send, str_received));
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worker.terminate();
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})();
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}
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