test_backgroundupdate_reason.js

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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-

 * vim: sw=2 ts=2 sts=2 et

 * this source code form is subject to the terms of the mozilla public license,

 * v. 2.0. if a copy of the mpl was not distributed with this file, you can

 * obtain one at http://mozilla.org/mpl/2.0/. */

"use strict";

const { BackgroundUpdate } = ChromeUtils.importESModule(

  "resource://gre/modules/BackgroundUpdate.sys.mjs"

);

add_setup(async function test_setup() {

  // These tests use per-installation prefs, and those are a shared resource, so

  // they require some non-trivial setup.

  setupTestCommon(null);

  await standardInit();

  // FOG needs a profile directory to put its data in.

  do_get_profile();

  // We need to initialize it once, otherwise operations will be stuck in the

  // pre-init queue.

  Services.fog.initializeFOG();

});

// Because we want to use the keys from REASON as strings and send these with

// Glean, we have to make sure, that they meet the requirements for `String

// Lists` and are not too long.

add_task(async function test_reasons_length() {

  for (const key of Object.keys(BackgroundUpdate.REASON)) {

    Glean.backgroundUpdate.reasonsToNotUpdate.add(key);

    // No exception means success.

    Assert.ok(

      Array.isArray(Glean.backgroundUpdate.reasonsToNotUpdate.testGetValue()),

      "Glean allows the name of the reason to be '" + key + "'"

);

});

// The string list in Glean can overflow and has a hard limit of 20 entries.

// This test toggles a switch to reach this limit and fails if this causes an

// exception, because we want to avoid that statistical data collection can have

// an negative impact on the success rate of background updates.

add_task(async function test_reasons_overflow() {

  let prev = await UpdateUtils.getAppUpdateAutoEnabled();

  try {

    for (let i = 1; i <= 21; i++) {

      await UpdateUtils.setAppUpdateAutoEnabled(false);

      await BackgroundUpdate._reasonsToNotUpdateInstallation();

      await UpdateUtils.setAppUpdateAutoEnabled(true);

      await BackgroundUpdate._reasonsToNotUpdateInstallation();

      Assert.ok(true, "Overflow test successful for run #" + i);

  } finally {

    ok(true, "resetting AppUpdateAutoEnabled to " + prev);

    await UpdateUtils.setAppUpdateAutoEnabled(prev);

});

add_task(async () => {

  // `setupTestCommon()` calls `do_test_pending()`; this calls

  // `do_test_finish()`.  The `add_task` schedules this to run after all the

  // other tests have completed.

  await doTestFinish();

});