test_serial_api.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test Web Serial API - API Surface</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";

SimpleTest.registerCleanupFunction(cleanupSerialPorts);

add_task(async function testGetPortsReturnsArray() {

  await cleanupSerialPorts();

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

  ok(Array.isArray(ports), "getPorts() should return an array");

  is(ports.length, 0, "getPorts() should return empty array initially");

});

add_task(async function testSerialPortConstructor() {

  ok("SerialPort" in window, "SerialPort should be defined");

  Assert.throws(

    () => new window.SerialPort(),

    TypeError,

    "SerialPort constructor should throw"

);

});

</script>

</body>

</html>