gecko-dev/browser/components/sessionstore/test/browser_586068-apptabs.js

/* 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/. */

const PREF_RESTORE_ON_DEMAND = "browser.sessionstore.restore_on_demand";

add_task(function* test() {
  Services.prefs.setBoolPref(PREF_RESTORE_ON_DEMAND, true);
  registerCleanupFunction(function () {
    Services.prefs.clearUserPref(PREF_RESTORE_ON_DEMAND);
  });

  let state = { windows: [{ tabs: [
    { entries: [{ url: "http://example.org/#1" }], extData: { "uniq": r() }, pinned: true },
    { entries: [{ url: "http://example.org/#2" }], extData: { "uniq": r() }, pinned: true },
    { entries: [{ url: "http://example.org/#3" }], extData: { "uniq": r() }, pinned: true },
    { entries: [{ url: "http://example.org/#4" }], extData: { "uniq": r() } },
    { entries: [{ url: "http://example.org/#5" }], extData: { "uniq": r() } },
    { entries: [{ url: "http://example.org/#6" }], extData: { "uniq": r() } },
    { entries: [{ url: "http://example.org/#7" }], extData: { "uniq": r() } },
  ], selected: 5 }] };

  let loadCount = 0;
  let promiseRestoringTabs = new Promise(resolve => {
    gProgressListener.setCallback(function (aBrowser, aNeedRestore, aRestoring, aRestored) {
      loadCount++;

      // We'll make sure that the loads we get come from pinned tabs or the
      // the selected tab.

      // get the tab
      let tab;
      for (let i = 0; i < window.gBrowser.tabs.length; i++) {
        if (!tab && window.gBrowser.tabs[i].linkedBrowser == aBrowser)
          tab = window.gBrowser.tabs[i];
      }

      ok(tab.pinned || tab.selected,
         "load came from pinned or selected tab");

      // We should get 4 loads: 3 app tabs + 1 normal selected tab
      if (loadCount < 4)
        return;

      gProgressListener.unsetCallback();
      resolve();
    });
  });

  let backupState = ss.getBrowserState();
  ss.setBrowserState(JSON.stringify(state));
  yield promiseRestoringTabs;

  // Cleanup.
  yield promiseBrowserState(backupState);
});