test_check_startupcache.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<head>

  <title>Check StartupCache</title>

  <meta charset="utf-8">

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

  <script type="text/javascript" src="head.js"></script>

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

</head>

<body>

<script type="text/javascript">

"use strict";

add_task(async function check_ExtensionParent_StartupCache_is_non_empty() {

  // This test aims to verify that the StartupCache of extensions is populated.

  // Ideally, we would load an extension, restart the browser and confirm the

  // existence of the StartupCache. That is not possible in a mochitest.

  // So we will just read the contents of the StartupCache and verify that it

  // populated and assume that it carries over to the next startup.

  // The latter is checked in test_startup_canary.html

  const { WebExtensionPolicy } = SpecialPowers.Cu.getGlobalForObject(SpecialPowers.Services);

  // The Mochikit extension is part of the mochitests framework, so the fact

  // that this test runs implies that the extension should have been started.

ok(

    WebExtensionPolicy.getByID("mochikit@mozilla.org"),

    "This test expects the Mochikit extension to be running"

);

  let chromeScript = loadChromeScript(() => {

    const {

      ExtensionParent,

    } = ChromeUtils.importESModule(

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

);

    const { StartupCache } = ExtensionParent;

    this.sendAsyncMessage("StartupCache_data", StartupCache._data);

});

  let map = await chromeScript.promiseOneMessage("StartupCache_data");

  chromeScript.destroy();

  // "manifests" is populated by Extension's parseManifest in Extension.sys.mjs.

  const keys = ["manifests", "mochikit@mozilla.org", "2.0", "en-US"];

  for (let key of keys) {

    map = map.get(key);

    ok(map, `StartupCache data map contains ${key}`);

  // At this point `map` is expected to be the return value of

  // ExtensionData's parseManifest.

is(

    map?.manifest?.applications?.gecko?.id,

    "mochikit@mozilla.org",

    "StartupCache.manifests contains a parsed manifest"

);

});

</script>

</body>

</html>