fune/browser/base/content/test/plugins/blocklist_proxy.js

var Cc = Components.classes;
var Ci = Components.interfaces;
var Cu = Components.utils;
var Cm = Components.manager;

const kBlocklistServiceUUID = "{66354bc9-7ed1-4692-ae1d-8da97d6b205e}";
const kBlocklistServiceContractID = "@mozilla.org/extensions/blocklist;1";
const kBlocklistServiceFactory = Cm.getClassObject(Cc[kBlocklistServiceContractID], Ci.nsIFactory);

Cu.import("resource://gre/modules/XPCOMUtils.jsm");

/*
 * A lightweight blocklist proxy for the testing purposes.
 */
var BlocklistProxy = {
  _uuid: null,

  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
                                         Ci.nsIBlocklistService,
                                         Ci.nsITimerCallback]),

  init() {
    if (!this._uuid) {
      this._uuid =
        Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator)
                                           .generateUUID();
      Cm.nsIComponentRegistrar.registerFactory(this._uuid, "",
                                               "@mozilla.org/extensions/blocklist;1",
                                               this);
    }
  },

  uninit() {
    if (this._uuid) {
      Cm.nsIComponentRegistrar.unregisterFactory(this._uuid, this);
      Cm.nsIComponentRegistrar.registerFactory(Components.ID(kBlocklistServiceUUID),
                                               "Blocklist Service",
                                               "@mozilla.org/extensions/blocklist;1",
                                               kBlocklistServiceFactory);
      this._uuid = null;
    }
  },

  notify(aTimer) {
  },

  observe(aSubject, aTopic, aData) {
  },

  isAddonBlocklisted(aAddon, aAppVersion, aToolkitVersion) {
    return false;
  },

  getAddonBlocklistState(aAddon, aAppVersion, aToolkitVersion) {
    return 0; // STATE_NOT_BLOCKED
  },

  getPluginBlocklistState(aPluginTag, aAppVersion, aToolkitVersion) {
    return 0; // STATE_NOT_BLOCKED
  },

  getAddonBlocklistURL(aAddon, aAppVersion, aToolkitVersion) {
    return "";
  },

  getPluginBlocklistURL(aPluginTag) {
    return "";
  },

  getPluginInfoURL(aPluginTag) {
    return "";
  },
}

BlocklistProxy.init();
addEventListener("unload", () => {
  BlocklistProxy.uninit();
});