test_serial_worker_main_forget.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test Web Serial API - Main Thread Forget Propagates to Worker</title>

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

  <script src="serial_test_utils.js"></script>

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

</head>

<body>

<script>

"use strict";

add_task(async function testMainThreadForgetPropagesToWorker() {

  await cleanupSerialPorts();

  info("Requesting port in window context");

  SpecialPowers.wrap(document).notifyUserGestureActivation();

  const port = await navigator.serial.requestPort({ filters: [] });

  ok(port, "requestPort should succeed in window context");

  let ports = await navigator.serial.getPorts();

  is(ports.length, 1, "Should have 1 port after requestPort in window");

  info("Creating worker to access granted port");

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

  const testPromise = new Promise((resolve, reject) => {

    worker.onmessage = async (e) => {

      if (e.data.type === "test") {

        const { result, message } = e.data;

        ok(result, message);

      } else if (e.data.type === "ready") {

        // Worker has obtained its port reference. Now forget from main thread.

        info("Worker is ready, forgetting port from main thread");

        await port.forget();

        ports = await navigator.serial.getPorts();

        is(ports.length, 0, "Main thread should have 0 ports after forget");

        // Tell the worker to check its ports.

        worker.postMessage("forgotten");

      } else if (e.data.type === "done") {

        resolve();

      } else if (e.data.type === "error") {

        reject(new Error(e.data.message));

};

    worker.onerror = (e) => {

      reject(new Error(`Worker error: ${e.message}`));

};

});

  try {

    await testPromise;

  } finally {

    worker.terminate();

});

</script>

</body>

</html>