test_messageChannel_atomics_wait.html

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<head>

  <meta charset="utf-8">

  <title>Test MessagePort.postMessage during eStateEntangling with Atomics.wait (Bug 2022378)</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

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<pre id="test">

<script type="application/javascript">

SimpleTest.waitForExplicitFinish();

SimpleTest.requestFlakyTimeout(

  "Need a timeout to detect if the message never arrives due to the bug"

);

const { port1, port2 } = new MessageChannel();

const worker = new Worker("worker_messageChannel_atomics_wait.js");

let timeoutId = setTimeout(function() {

  ok(false, "Timed out waiting for message - postMessage during eStateEntangling likely stuck");

  worker.terminate();

  SimpleTest.finish();

}, 10000);

port1.onmessage = function(event) {

  clearTimeout(timeoutId);

  is(event.data.foo, "bar", "Received expected message from worker via transferred port");

  worker.terminate();

  SimpleTest.finish();

};

// Transfer port2 to the worker. The worker will immediately call

// port.postMessage() then block with Atomics.wait().

worker.postMessage({ port: port2 }, [port2]);

</script>

</pre>

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