/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is sessionstore test code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *    Ehsan Akhgari <ehsan@mozilla.com>
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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function test() {
  /** Test for Bug 526613 **/
  
  // test setup
  let ss = Cc["@mozilla.org/browser/sessionstore;1"].
           getService(Ci.nsISessionStore);
  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:robots"        }] }], 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));
}
