gecko/browser/components/sessionstore/test/browser_526613.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/. */

function test() {
  /** Test for Bug 526613 **/

  // test setup
  waitForExplicitFinish();

  function browserWindowsCount(expected) {
    let count = 0;
    let e = Services.wm.getEnumerator("navigator:browser");
    while (e.hasMoreElements()) {
      if (!e.getNext().closed)
        ++count;
    }
    is(count, expected,
       "number of open browser windows according to nsIWindowMediator");
    let state = ss.getBrowserState();
    info(state);
    is(JSON.parse(state).windows.length, expected,
       "number of open browser windows according to getBrowserState");
  }

  browserWindowsCount(1);

  // backup old state
  let oldState = ss.getBrowserState();
  // create a new state for testing
  let testState = {
    windows: [
      { tabs: [{ entries: [{ url: "http://example.com/" }] }], selected: 1 },
      { tabs: [{ entries: [{ url: "about:mozilla"       }] }], selected: 1 },
    ],
    // make sure the first window is focused, otherwise when restoring the
    // old state, the first window is closed and the test harness gets unloaded
    selectedWindow: 1
  };

  let pass = 1;
  function observer(aSubject, aTopic, aData) {
    is(aTopic, "sessionstore-browser-state-restored",
       "The sessionstore-browser-state-restored notification was observed");

    if (pass++ == 1) {
      browserWindowsCount(2);

      // let the first window be focused (see above)
      function pollMostRecentWindow() {
        if (Services.wm.getMostRecentWindow("navigator:browser") == window) {
          ss.setBrowserState(oldState);
        } else {
          info("waiting for the current window to become active");
          setTimeout(pollMostRecentWindow, 0);
          window.focus(); //XXX Why is this needed?
        }
      }
      pollMostRecentWindow();
    }
    else {
      browserWindowsCount(1);
      ok(!window.closed, "Restoring the old state should have left this window open");
      Services.obs.removeObserver(observer, "sessionstore-browser-state-restored");
      finish();
    }
  }
  Services.obs.addObserver(observer, "sessionstore-browser-state-restored", false);

  // set browser to test state
  ss.setBrowserState(JSON.stringify(testState));
}