test_AboutHomeStartupCacheChild.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

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

"use strict";

const { AboutHomeStartupCacheChild } = ChromeUtils.importESModule(

  "resource:///modules/AboutNewTabService.sys.mjs"

);

/**

 * Tests that AboutHomeStartupCacheChild will terminate its PromiseWorker

 * on memory-pressure, and that a new PromiseWorker can then be generated on

 * demand.

*/

add_task(async function test_memory_pressure() {

  AboutHomeStartupCacheChild.init();

  let worker = AboutHomeStartupCacheChild.getOrCreateWorker();

  Assert.ok(worker, "Should have been able to get the worker.");

  Assert.equal(

    worker,

    AboutHomeStartupCacheChild.getOrCreateWorker(),

    "The worker is cached and re-usable."

);

  Services.obs.notifyObservers(null, "memory-pressure", "heap-minimize");

  let newWorker = AboutHomeStartupCacheChild.getOrCreateWorker();

  Assert.notEqual(worker, newWorker, "Old worker should have been replaced.");

  AboutHomeStartupCacheChild.uninit();

});