test_front_destroy.js

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/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

/**

 * Test that fronts throw errors if they are called after being destroyed.

*/

"use strict";

// HACK: ServiceWorkerManager requires the "profile-change-teardown" to cleanly

// shutdown, and setting _profileInitialized to `true` will trigger those

// notifications (see /testing/xpcshell/head.js).

// eslint-disable-next-line no-undef

_profileInitialized = true;

add_task(async function test() {

  DevToolsServer.init();

  DevToolsServer.registerAllActors();

  info("Create and connect the DevToolsClient");

  const transport = DevToolsServer.connectPipe();

  const client = new DevToolsClient(transport);

  await client.connect();

  info("Get the device front and check calling getDescription() on it");

  const front = await client.mainRoot.getFront("device");

  const description = await front.getDescription();

ok(

    !!description,

    "Check that the getDescription() method returns a valid response."

);

  info("Destroy the device front and try calling getDescription again");

  front.destroy();

  Assert.throws(

    () => front.getDescription(),

    /Can not send request 'getDescription' because front 'device' is already destroyed\./,

    "Check device front throws when getDescription() is called after destroy()"

);

  await client.close();

});