/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/
 */
/*globals end_test*/

Components.utils.import("resource://gre/modules/NetUtil.jsm");

var tmp = {};
Components.utils.import("resource://gre/modules/AddonManager.jsm", tmp);
Components.utils.import("resource://gre/modules/Log.jsm", tmp);
var AddonManager = tmp.AddonManager;
var AddonManagerPrivate = tmp.AddonManagerPrivate;
var Log = tmp.Log;

var pathParts = gTestPath.split("/");
// Drop the test filename
pathParts.splice(pathParts.length - 1, pathParts.length);

var gTestInWindow = /-window$/.test(pathParts[pathParts.length - 1]);

// Drop the UI type
if (gTestInWindow) {
  pathParts.splice(pathParts.length - 1, pathParts.length);
}

const RELATIVE_DIR = pathParts.slice(4).join("/") + "/";

const TESTROOT = "http://example.com/" + RELATIVE_DIR;
const SECURE_TESTROOT = "https://example.com/" + RELATIVE_DIR;
const TESTROOT2 = "http://example.org/" + RELATIVE_DIR;
const SECURE_TESTROOT2 = "https://example.org/" + RELATIVE_DIR;
const CHROMEROOT = pathParts.join("/") + "/";
const PREF_DISCOVERURL = "extensions.webservice.discoverURL";
const PREF_DISCOVER_ENABLED = "extensions.getAddons.showPane";
const PREF_XPI_ENABLED = "xpinstall.enabled";
const PREF_UPDATEURL = "extensions.update.url";
const PREF_GETADDONS_CACHE_ENABLED = "extensions.getAddons.cache.enabled";
const PREF_CUSTOM_XPINSTALL_CONFIRMATION_UI = "xpinstall.customConfirmationUI";
const PREF_UI_LASTCATEGORY = "extensions.ui.lastCategory";

const MANAGER_URI = "about:addons";
const INSTALL_URI = "chrome://mozapps/content/xpinstall/xpinstallConfirm.xul";
const PREF_LOGGING_ENABLED = "extensions.logging.enabled";
const PREF_SEARCH_MAXRESULTS = "extensions.getAddons.maxResults";
const PREF_STRICT_COMPAT = "extensions.strictCompatibility";

var PREF_CHECK_COMPATIBILITY;
(function() {
  var channel = "default";
  try {
    channel = Services.prefs.getCharPref("app.update.channel");
  } catch (e) { }
  if (channel != "aurora" &&
    channel != "beta" &&
    channel != "release" &&
    channel != "esr") {
    var version = "nightly";
  } else {
    version = Services.appinfo.version.replace(/^([^\.]+\.[0-9]+[a-z]*).*/gi, "$1");
  }
  PREF_CHECK_COMPATIBILITY = "extensions.checkCompatibility." + version;
})();

var gPendingTests = [];
var gTestsRun = 0;
var gTestStart = null;

var gUseInContentUI = !gTestInWindow && ("switchToTabHavingURI" in window);

var gRestorePrefs = [{name: PREF_LOGGING_ENABLED},
                     {name: PREF_CUSTOM_XPINSTALL_CONFIRMATION_UI},
                     {name: "extensions.webservice.discoverURL"},
                     {name: "extensions.update.url"},
                     {name: "extensions.update.background.url"},
                     {name: "extensions.update.enabled"},
                     {name: "extensions.update.autoUpdateDefault"},
                     {name: "extensions.getAddons.get.url"},
                     {name: "extensions.getAddons.getWithPerformance.url"},
                     {name: "extensions.getAddons.search.browseURL"},
                     {name: "extensions.getAddons.search.url"},
                     {name: "extensions.getAddons.cache.enabled"},
                     {name: "devtools.chrome.enabled"},
                     {name: PREF_SEARCH_MAXRESULTS},
                     {name: PREF_STRICT_COMPAT},
                     {name: PREF_CHECK_COMPATIBILITY}];

for (let pref of gRestorePrefs) {
  if (!Services.prefs.prefHasUserValue(pref.name)) {
    pref.type = "clear";
    continue;
  }
  pref.type = Services.prefs.getPrefType(pref.name);
  if (pref.type == Services.prefs.PREF_BOOL)
    pref.value = Services.prefs.getBoolPref(pref.name);
  else if (pref.type == Services.prefs.PREF_INT)
    pref.value = Services.prefs.getIntPref(pref.name);
  else if (pref.type == Services.prefs.PREF_STRING)
    pref.value = Services.prefs.getCharPref(pref.name);
}

// Turn logging on for all tests
Services.prefs.setBoolPref(PREF_LOGGING_ENABLED, true);

Services.prefs.setBoolPref(PREF_CUSTOM_XPINSTALL_CONFIRMATION_UI, false);

// Helper to register test failures and close windows if any are left open
function checkOpenWindows(aWindowID) {
  let windows = Services.wm.getEnumerator(aWindowID);
  let found = false;
  while (windows.hasMoreElements()) {
    let win = windows.getNext().QueryInterface(Ci.nsIDOMWindow);
    if (!win.closed) {
      found = true;
      win.close();
    }
  }
  if (found)
    ok(false, "Found unexpected " + aWindowID + " window still open");
}

// Tools to disable and re-enable the background update and blocklist timers
// so that tests can protect themselves from unwanted timer events.
var gCatMan = Components.classes["@mozilla.org/categorymanager;1"]
                           .getService(Components.interfaces.nsICategoryManager);
// Default values from toolkit/mozapps/extensions/extensions.manifest, but disable*UpdateTimer()
// records the actual value so we can put it back in enable*UpdateTimer()
var backgroundUpdateConfig = "@mozilla.org/addons/integration;1,getService,addon-background-update-timer,extensions.update.interval,86400";
var blocklistUpdateConfig = "@mozilla.org/extensions/blocklist;1,getService,blocklist-background-update-timer,extensions.blocklist.interval,86400";

var UTIMER = "update-timer";
var AMANAGER = "addonManager";
var BLOCKLIST = "nsBlocklistService";

function disableBackgroundUpdateTimer() {
  info("Disabling " + UTIMER + " " + AMANAGER);
  backgroundUpdateConfig = gCatMan.getCategoryEntry(UTIMER, AMANAGER);
  gCatMan.deleteCategoryEntry(UTIMER, AMANAGER, true);
}

function enableBackgroundUpdateTimer() {
  info("Enabling " + UTIMER + " " + AMANAGER);
  gCatMan.addCategoryEntry(UTIMER, AMANAGER, backgroundUpdateConfig, false, true);
}

function disableBlocklistUpdateTimer() {
  info("Disabling " + UTIMER + " " + BLOCKLIST);
  blocklistUpdateConfig = gCatMan.getCategoryEntry(UTIMER, BLOCKLIST);
  gCatMan.deleteCategoryEntry(UTIMER, BLOCKLIST, true);
}

function enableBlocklistUpdateTimer() {
  info("Enabling " + UTIMER + " " + BLOCKLIST);
  gCatMan.addCategoryEntry(UTIMER, BLOCKLIST, blocklistUpdateConfig, false, true);
}

registerCleanupFunction(function() {
  // Restore prefs
  for (let pref of gRestorePrefs) {
    if (pref.type == "clear")
      Services.prefs.clearUserPref(pref.name);
    else if (pref.type == Services.prefs.PREF_BOOL)
      Services.prefs.setBoolPref(pref.name, pref.value);
    else if (pref.type == Services.prefs.PREF_INT)
      Services.prefs.setIntPref(pref.name, pref.value);
    else if (pref.type == Services.prefs.PREF_STRING)
      Services.prefs.setCharPref(pref.name, pref.value);
  }

  // Throw an error if the add-ons manager window is open anywhere
  checkOpenWindows("Addons:Manager");
  checkOpenWindows("Addons:Compatibility");
  checkOpenWindows("Addons:Install");

  return new Promise((resolve, reject) => AddonManager.getAllInstalls(resolve))
    .then(aInstalls => {
      for (let install of aInstalls) {
        if (install instanceof MockInstall)
          continue;

        ok(false, "Should not have seen an install of " + install.sourceURI.spec + " in state " + install.state);
        install.cancel();
      }
    });
});

function log_exceptions(aCallback, ...aArgs) {
  try {
    return aCallback.apply(null, aArgs);
  }
  catch (e) {
    info("Exception thrown: " + e);
    throw e;
  }
}

function log_callback(aPromise, aCallback) {
  aPromise.then(aCallback)
    .then(null, e => info("Exception thrown: " + e));
  return aPromise;
}

function add_test(test) {
  gPendingTests.push(test);
}

function run_next_test() {
  // Make sure we're not calling run_next_test from inside an add_task() test
  // We're inside the browser_test.js 'testScope' here
  if (this.__tasks) {
    throw new Error("run_next_test() called from an add_task() test function. " +
                    "run_next_test() should not be called from inside add_task() " +
                    "under any circumstances!");
  }
  if (gTestsRun > 0)
    info("Test " + gTestsRun + " took " + (Date.now() - gTestStart) + "ms");

  if (gPendingTests.length == 0) {
    executeSoon(end_test);
    return;
  }

  gTestsRun++;
  var test = gPendingTests.shift();
  if (test.name)
    info("Running test " + gTestsRun + " (" + test.name + ")");
  else
    info("Running test " + gTestsRun);

  gTestStart = Date.now();
  executeSoon(() => log_exceptions(test));
}

var get_tooltip_info = Task.async(function*(addon) {
  let managerWindow = addon.ownerDocument.defaultView;

  // The popup code uses a triggering event's target to set the
  // document.tooltipNode property.
  let nameNode = addon.ownerDocument.getAnonymousElementByAttribute(addon, "anonid", "name");
  let event = new managerWindow.CustomEvent("TriggerEvent");
  nameNode.dispatchEvent(event);

  let tooltip = managerWindow.document.getElementById("addonitem-tooltip");

  let promise = BrowserTestUtils.waitForEvent(tooltip, "popupshown");
  tooltip.openPopup(nameNode, "after_start", 0, 0, false, false, event);
  yield promise;

  let tiptext = tooltip.label;

  promise = BrowserTestUtils.waitForEvent(tooltip, "popuphidden");
  tooltip.hidePopup();
  yield promise;

  let expectedName = addon.getAttribute("name");
  ok(tiptext.substring(0, expectedName.length), expectedName,
     "Tooltip should always start with the expected name");

  if (expectedName.length == tiptext.length) {
    return {
      name: tiptext,
      version: undefined
    };
  }
  else {
    return {
      name: tiptext.substring(0, expectedName.length),
      version: tiptext.substring(expectedName.length + 1)
    };
  }
});

function get_addon_file_url(aFilename) {
  try {
    var cr = Cc["@mozilla.org/chrome/chrome-registry;1"].
             getService(Ci.nsIChromeRegistry);
    var fileurl = cr.convertChromeURL(makeURI(CHROMEROOT + "addons/" + aFilename));
    return fileurl.QueryInterface(Ci.nsIFileURL);
  } catch(ex) {
    var jar = getJar(CHROMEROOT + "addons/" + aFilename);
    var tmpDir = extractJarToTmp(jar);
    tmpDir.append(aFilename);

    return Services.io.newFileURI(tmpDir).QueryInterface(Ci.nsIFileURL);
  }
}

function get_test_items_in_list(aManager) {
  var tests = "@tests.mozilla.org";

  let view = aManager.document.getElementById("view-port").selectedPanel;
  let listid = view.id == "search-view" ? "search-list" : "addon-list";
  let item = aManager.document.getElementById(listid).firstChild;
  let items = [];

  while (item) {
    if (item.localName != "richlistitem") {
      item = item.nextSibling;
      continue;
    }

    if (!item.mAddon || item.mAddon.id.substring(item.mAddon.id.length - tests.length) == tests)
      items.push(item);
    item = item.nextSibling;
  }

  return items;
}

function check_all_in_list(aManager, aIds, aIgnoreExtras) {
  var doc = aManager.document;
  var view = doc.getElementById("view-port").selectedPanel;
  var listid = view.id == "search-view" ? "search-list" : "addon-list";
  var list = doc.getElementById(listid);

  var inlist = [];
  var node = list.firstChild;
  while (node) {
    if (node.value)
      inlist.push(node.value);
    node = node.nextSibling;
  }

  for (let id of aIds) {
    if (inlist.indexOf(id) == -1)
      ok(false, "Should find " + id + " in the list");
  }

  if (aIgnoreExtras)
    return;

  for (let inlistItem of inlist) {
    if (aIds.indexOf(inlistItem) == -1)
      ok(false, "Shouldn't have seen " + inlistItem + " in the list");
  }
}

function get_addon_element(aManager, aId) {
  var doc = aManager.document;
  var view = doc.getElementById("view-port").selectedPanel;
  var listid = "addon-list";
  if (view.id == "search-view")
    listid = "search-list";
  else if (view.id == "updates-view")
    listid = "updates-list";
  var list = doc.getElementById(listid);

  var node = list.firstChild;
  while (node) {
    if (node.value == aId)
      return node;
    node = node.nextSibling;
  }
  return null;
}

function wait_for_view_load(aManagerWindow, aCallback, aForceWait, aLongerTimeout) {
  requestLongerTimeout(aLongerTimeout ? aLongerTimeout : 2);

  if (!aForceWait && !aManagerWindow.gViewController.isLoading) {
    log_exceptions(aCallback, aManagerWindow);
    return;
  }

  aManagerWindow.document.addEventListener("ViewChanged", function() {
    aManagerWindow.document.removeEventListener("ViewChanged", arguments.callee, false);
    log_exceptions(aCallback, aManagerWindow);
  }, false);
}

function wait_for_manager_load(aManagerWindow, aCallback) {
  if (!aManagerWindow.gIsInitializing) {
    log_exceptions(aCallback, aManagerWindow);
    return;
  }

  info("Waiting for initialization");
  aManagerWindow.document.addEventListener("Initialized", function() {
    aManagerWindow.document.removeEventListener("Initialized", arguments.callee, false);
    log_exceptions(aCallback, aManagerWindow);
  }, false);
}

function open_manager(aView, aCallback, aLoadCallback, aLongerTimeout) {
  let p = new Promise((resolve, reject) => {

    function setup_manager(aManagerWindow) {
      if (aLoadCallback)
        log_exceptions(aLoadCallback, aManagerWindow);

      if (aView)
        aManagerWindow.loadView(aView);

      ok(aManagerWindow != null, "Should have an add-ons manager window");
      is(aManagerWindow.location, MANAGER_URI, "Should be displaying the correct UI");

      waitForFocus(function() {
        info("window has focus, waiting for manager load");
        wait_for_manager_load(aManagerWindow, function() {
          info("Manager waiting for view load");
          wait_for_view_load(aManagerWindow, function() {
            resolve(aManagerWindow);
          }, null, aLongerTimeout);
        });
      }, aManagerWindow);
    }

    if (gUseInContentUI) {
      info("Loading manager window in tab");
      Services.obs.addObserver(function (aSubject, aTopic, aData) {
        Services.obs.removeObserver(arguments.callee, aTopic);
        if (aSubject.location.href != MANAGER_URI) {
          info("Ignoring load event for " + aSubject.location.href);
          return;
        }
        setup_manager(aSubject);
      }, "EM-loaded", false);

      gBrowser.selectedTab = gBrowser.addTab();
      switchToTabHavingURI(MANAGER_URI, true);
    } else {
      info("Loading manager window in dialog");
      Services.obs.addObserver(function (aSubject, aTopic, aData) {
        Services.obs.removeObserver(arguments.callee, aTopic);
        setup_manager(aSubject);
      }, "EM-loaded", false);

      openDialog(MANAGER_URI);
    }
  });

  // The promise resolves with the manager window, so it is passed to the callback
  return log_callback(p, aCallback);
}

function close_manager(aManagerWindow, aCallback, aLongerTimeout) {
  let p = new Promise((resolve, reject) => {
    requestLongerTimeout(aLongerTimeout ? aLongerTimeout : 2);

    ok(aManagerWindow != null, "Should have an add-ons manager window to close");
    is(aManagerWindow.location, MANAGER_URI, "Should be closing window with correct URI");

    aManagerWindow.addEventListener("unload", function() {
      try {
        dump("Manager window unload handler\n");
        this.removeEventListener("unload", arguments.callee, false);
        resolve();
      } catch(e) {
        reject(e);
      }
    }, false);
  });

  info("Telling manager window to close");
  aManagerWindow.close();
  info("Manager window close() call returned");

  return log_callback(p, aCallback);
}

function restart_manager(aManagerWindow, aView, aCallback, aLoadCallback) {
  if (!aManagerWindow) {
    return open_manager(aView, aCallback, aLoadCallback);
  }

  return close_manager(aManagerWindow)
    .then(() => open_manager(aView, aCallback, aLoadCallback));
}

function wait_for_window_open(aCallback) {
  Services.wm.addListener({
    onOpenWindow: function(aWindow) {
      Services.wm.removeListener(this);

      let domwindow = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
                             .getInterface(Ci.nsIDOMWindow);
      domwindow.addEventListener("load", function() {
        domwindow.removeEventListener("load", arguments.callee, false);
        executeSoon(function() {
          aCallback(domwindow);
        });
      }, false);
    },

    onCloseWindow: function(aWindow) {
    },

    onWindowTitleChange: function(aWindow, aTitle) {
    }
  });
}

function get_string(aName, ...aArgs) {
  var bundle = Services.strings.createBundle("chrome://mozapps/locale/extensions/extensions.properties");
  if (aArgs.length == 0)
    return bundle.GetStringFromName(aName);
  return bundle.formatStringFromName(aName, aArgs, aArgs.length);
}

function formatDate(aDate) {
  return Cc["@mozilla.org/intl/scriptabledateformat;1"]
           .getService(Ci.nsIScriptableDateFormat)
           .FormatDate("",
                       Ci.nsIScriptableDateFormat.dateFormatLong,
                       aDate.getFullYear(),
                       aDate.getMonth() + 1,
                       aDate.getDate()
                       );
}

function is_hidden(aElement) {
  var style = aElement.ownerDocument.defaultView.getComputedStyle(aElement, "");
  if (style.display == "none")
    return true;
  if (style.visibility != "visible")
    return true;

  // Hiding a parent element will hide all its children
  if (aElement.parentNode != aElement.ownerDocument)
    return is_hidden(aElement.parentNode);

  return false;
}

function is_element_visible(aElement, aMsg) {
  isnot(aElement, null, "Element should not be null, when checking visibility");
  ok(!is_hidden(aElement), aMsg || (aElement + " should be visible"));
}

function is_element_hidden(aElement, aMsg) {
  isnot(aElement, null, "Element should not be null, when checking visibility");
  ok(is_hidden(aElement), aMsg || (aElement + " should be hidden"));
}

function promiseAddonByID(aId) {
  return new Promise(resolve => {
    AddonManager.getAddonByID(aId, resolve);
  });
}

function promiseAddonsByIDs(aIDs) {
  return new Promise(resolve => {
    AddonManager.getAddonsByIDs(aIDs, resolve);
  });
}
/**
 * Install an add-on and call a callback when complete.
 *
 * The callback will receive the Addon for the installed add-on.
 */
function install_addon(path, cb, pathPrefix=TESTROOT) {
  let p = new Promise((resolve, reject) => {
    AddonManager.getInstallForURL(pathPrefix + path, (install) => {
      install.addListener({
        onInstallEnded: () => resolve(install.addon),
      });

      install.install();
    }, "application/x-xpinstall");
  });

  return log_callback(p, cb);
}

function CategoryUtilities(aManagerWindow) {
  this.window = aManagerWindow;

  var self = this;
  this.window.addEventListener("unload", function() {
    self.window.removeEventListener("unload", arguments.callee, false);
    self.window = null;
  }, false);
}

CategoryUtilities.prototype = {
  window: null,

  get selectedCategory() {
    isnot(this.window, null, "Should not get selected category when manager window is not loaded");
    var selectedItem = this.window.document.getElementById("categories").selectedItem;
    isnot(selectedItem, null, "A category should be selected");
    var view = this.window.gViewController.parseViewId(selectedItem.value);
    return (view.type == "list") ? view.param : view.type;
  },

  get: function(aCategoryType, aAllowMissing) {
    isnot(this.window, null, "Should not get category when manager window is not loaded");
    var categories = this.window.document.getElementById("categories");

    var viewId = "addons://list/" + aCategoryType;
    var items = categories.getElementsByAttribute("value", viewId);
    if (items.length)
      return items[0];

    viewId = "addons://" + aCategoryType + "/";
    items = categories.getElementsByAttribute("value", viewId);
    if (items.length)
      return items[0];

    if (!aAllowMissing)
      ok(false, "Should have found a category with type " + aCategoryType);
    return null;
  },

  getViewId: function(aCategoryType) {
    isnot(this.window, null, "Should not get view id when manager window is not loaded");
    return this.get(aCategoryType).value;
  },

  isVisible: function(aCategory) {
    isnot(this.window, null, "Should not check visible state when manager window is not loaded");
    if (aCategory.hasAttribute("disabled") &&
        aCategory.getAttribute("disabled") == "true")
      return false;

    return !is_hidden(aCategory);
  },

  isTypeVisible: function(aCategoryType) {
    return this.isVisible(this.get(aCategoryType));
  },

  open: function(aCategory, aCallback) {

    isnot(this.window, null, "Should not open category when manager window is not loaded");
    ok(this.isVisible(aCategory), "Category should be visible if attempting to open it");

    EventUtils.synthesizeMouse(aCategory, 2, 2, { }, this.window);
    let p = new Promise((resolve, reject) => wait_for_view_load(this.window, resolve));

    return log_callback(p, aCallback);
  },

  openType: function(aCategoryType, aCallback) {
    return this.open(this.get(aCategoryType), aCallback);
  }
}

function CertOverrideListener(host, bits) {
  this.host = host;
  this.bits = bits;
}

CertOverrideListener.prototype = {
  host: null,
  bits: null,

  getInterface: function (aIID) {
    return this.QueryInterface(aIID);
  },

  QueryInterface: function(aIID) {
    if (aIID.equals(Ci.nsIBadCertListener2) ||
        aIID.equals(Ci.nsIInterfaceRequestor) ||
        aIID.equals(Ci.nsISupports))
      return this;

    throw Components.Exception("No interface", Components.results.NS_ERROR_NO_INTERFACE);
  },

  notifyCertProblem: function (socketInfo, sslStatus, targetHost) {
    var cert = sslStatus.QueryInterface(Components.interfaces.nsISSLStatus)
                        .serverCert;
    var cos = Cc["@mozilla.org/security/certoverride;1"].
              getService(Ci.nsICertOverrideService);
    cos.rememberValidityOverride(this.host, -1, cert, this.bits, false);
    return true;
  }
}

// Add overrides for the bad certificates
function addCertOverride(host, bits) {
  var req = new XMLHttpRequest();
  try {
    req.open("GET", "https://" + host + "/", false);
    req.channel.notificationCallbacks = new CertOverrideListener(host, bits);
    req.send(null);
  }
  catch (e) {
    // This request will fail since the SSL server is not trusted yet
  }
}

/***** Mock Provider *****/

function MockProvider(aUseAsyncCallbacks, aTypes) {
  this.addons = [];
  this.installs = [];
  this.callbackTimers = [];
  this.timerLocations = new Map();
  this.useAsyncCallbacks = (aUseAsyncCallbacks === undefined) ? true : aUseAsyncCallbacks;
  this.types = (aTypes === undefined) ? [{
    id: "extension",
    name: "Extensions",
    uiPriority: 4000,
    flags: AddonManager.TYPE_UI_VIEW_LIST |
           AddonManager.TYPE_SUPPORTS_UNDO_RESTARTLESS_UNINSTALL,
  }] : aTypes;

  var self = this;
  registerCleanupFunction(function() {
    if (self.started)
      self.unregister();
  });

  this.register();
}

MockProvider.prototype = {
  addons: null,
  installs: null,
  started: null,
  apiDelay: 10,
  callbackTimers: null,
  timerLocations: null,
  useAsyncCallbacks: null,
  types: null,

  /***** Utility functions *****/

  /**
   * Register this provider with the AddonManager
   */
  register: function MP_register() {
    info("Registering mock add-on provider");
    AddonManagerPrivate.registerProvider(this, this.types);
  },

  /**
   * Unregister this provider with the AddonManager
   */
  unregister: function MP_unregister() {
    info("Unregistering mock add-on provider");
    AddonManagerPrivate.unregisterProvider(this);
  },

  /**
   * Adds an add-on to the list of add-ons that this provider exposes to the
   * AddonManager, dispatching appropriate events in the process.
   *
   * @param  aAddon
   *         The add-on to add
   */
  addAddon: function MP_addAddon(aAddon) {
    var oldAddons = this.addons.filter(aOldAddon => aOldAddon.id == aAddon.id);
    var oldAddon = oldAddons.length > 0 ? oldAddons[0] : null;

    this.addons = this.addons.filter(aOldAddon => aOldAddon.id != aAddon.id);

    this.addons.push(aAddon);
    aAddon._provider = this;

    if (!this.started)
      return;

    let requiresRestart = (aAddon.operationsRequiringRestart &
                           AddonManager.OP_NEEDS_RESTART_INSTALL) != 0;
    AddonManagerPrivate.callInstallListeners("onExternalInstall", null, aAddon,
                                             oldAddon, requiresRestart)
  },

  /**
   * Removes an add-on from the list of add-ons that this provider exposes to
   * the AddonManager, dispatching the onUninstalled event in the process.
   *
   * @param  aAddon
   *         The add-on to add
   */
  removeAddon: function MP_removeAddon(aAddon) {
    var pos = this.addons.indexOf(aAddon);
    if (pos == -1) {
      ok(false, "Tried to remove an add-on that wasn't registered with the mock provider");
      return;
    }

    this.addons.splice(pos, 1);

    if (!this.started)
      return;

    AddonManagerPrivate.callAddonListeners("onUninstalled", aAddon);
  },

  /**
   * Adds an add-on install to the list of installs that this provider exposes
   * to the AddonManager, dispatching appropriate events in the process.
   *
   * @param  aInstall
   *         The add-on install to add
   */
  addInstall: function MP_addInstall(aInstall) {
    this.installs.push(aInstall);
    aInstall._provider = this;

    if (!this.started)
      return;

    aInstall.callListeners("onNewInstall");
  },

  removeInstall: function MP_removeInstall(aInstall) {
    var pos = this.installs.indexOf(aInstall);
    if (pos == -1) {
      ok(false, "Tried to remove an install that wasn't registered with the mock provider");
      return;
    }

    this.installs.splice(pos, 1);
  },

  /**
   * Creates a set of mock add-on objects and adds them to the list of add-ons
   * managed by this provider.
   *
   * @param  aAddonProperties
   *         An array of objects containing properties describing the add-ons
   * @return Array of the new MockAddons
   */
  createAddons: function MP_createAddons(aAddonProperties) {
    var newAddons = [];
    for (let addonProp of aAddonProperties) {
      let addon = new MockAddon(addonProp.id);
      for (let prop in addonProp) {
        if (prop == "id")
          continue;
        if (prop == "applyBackgroundUpdates") {
          addon._applyBackgroundUpdates = addonProp[prop];
          continue;
        }
        if (prop == "appDisabled") {
          addon._appDisabled = addonProp[prop];
          continue;
        }
        addon[prop] = addonProp[prop];
      }
      if (!addon.optionsType && !!addon.optionsURL)
        addon.optionsType = AddonManager.OPTIONS_TYPE_DIALOG;

      // Make sure the active state matches the passed in properties
      addon.isActive = addon.shouldBeActive;

      this.addAddon(addon);
      newAddons.push(addon);
    }

    return newAddons;
  },

  /**
   * Creates a set of mock add-on install objects and adds them to the list
   * of installs managed by this provider.
   *
   * @param  aInstallProperties
   *         An array of objects containing properties describing the installs
   * @return Array of the new MockInstalls
   */
  createInstalls: function MP_createInstalls(aInstallProperties) {
    var newInstalls = [];
    for (let installProp of aInstallProperties) {
      let install = new MockInstall(installProp.name || null,
                                    installProp.type || null,
                                    null);
      for (let prop in installProp) {
        switch (prop) {
          case "name":
          case "type":
            break;
          case "sourceURI":
            install[prop] = NetUtil.newURI(installProp[prop]);
            break;
          default:
            install[prop] = installProp[prop];
        }
      }
      this.addInstall(install);
      newInstalls.push(install);
    }

    return newInstalls;
  },

  /***** AddonProvider implementation *****/

  /**
   * Called to initialize the provider.
   */
  startup: function MP_startup() {
    this.started = true;
  },

  /**
   * Called when the provider should shutdown.
   */
  shutdown: function MP_shutdown() {
    if (this.callbackTimers.length) {
      info("MockProvider: pending callbacks at shutdown(): calling immediately");
    }
    while (this.callbackTimers.length > 0) {
      // When we notify the callback timer, it removes itself from our array
      let timer = this.callbackTimers[0];
      try {
        let setAt = this.timerLocations.get(timer);
        info("Notifying timer set at " + (setAt || "unknown location"));
        timer.callback.notify(timer);
        timer.cancel();
      } catch(e) {
        info("Timer notify failed: " + e);
      }
    }
    this.callbackTimers = [];
    this.timerLocations = null;

    this.started = false;
  },

  /**
   * Called to get an Addon with a particular ID.
   *
   * @param  aId
   *         The ID of the add-on to retrieve
   * @param  aCallback
   *         A callback to pass the Addon to
   */
  getAddonByID: function MP_getAddon(aId, aCallback) {
    for (let addon of this.addons) {
      if (addon.id == aId) {
        this._delayCallback(aCallback, addon);
        return;
      }
    }

    aCallback(null);
  },

  /**
   * Called to get Addons of a particular type.
   *
   * @param  aTypes
   *         An array of types to fetch. Can be null to get all types.
   * @param  callback
   *         A callback to pass an array of Addons to
   */
  getAddonsByTypes: function MP_getAddonsByTypes(aTypes, aCallback) {
    var addons = this.addons.filter(function(aAddon) {
      if (aTypes && aTypes.length > 0 && aTypes.indexOf(aAddon.type) == -1)
        return false;
      return true;
    });
    this._delayCallback(aCallback, addons);
  },

  /**
   * Called to get Addons that have pending operations.
   *
   * @param  aTypes
   *         An array of types to fetch. Can be null to get all types
   * @param  aCallback
   *         A callback to pass an array of Addons to
   */
  getAddonsWithOperationsByTypes: function MP_getAddonsWithOperationsByTypes(aTypes, aCallback) {
    var addons = this.addons.filter(function(aAddon) {
      if (aTypes && aTypes.length > 0 && aTypes.indexOf(aAddon.type) == -1)
        return false;
      return aAddon.pendingOperations != 0;
    });
    this._delayCallback(aCallback, addons);
  },

  /**
   * Called to get the current AddonInstalls, optionally restricting by type.
   *
   * @param  aTypes
   *         An array of types or null to get all types
   * @param  aCallback
   *         A callback to pass the array of AddonInstalls to
   */
  getInstallsByTypes: function MP_getInstallsByTypes(aTypes, aCallback) {
    var installs = this.installs.filter(function(aInstall) {
      // Appear to have actually removed cancelled installs from the provider
      if (aInstall.state == AddonManager.STATE_CANCELLED)
        return false;

      if (aTypes && aTypes.length > 0 && aTypes.indexOf(aInstall.type) == -1)
        return false;

      return true;
    });
    this._delayCallback(aCallback, installs);
  },

  /**
   * Called when a new add-on has been enabled when only one add-on of that type
   * can be enabled.
   *
   * @param  aId
   *         The ID of the newly enabled add-on
   * @param  aType
   *         The type of the newly enabled add-on
   * @param  aPendingRestart
   *         true if the newly enabled add-on will only become enabled after a
   *         restart
   */
  addonChanged: function MP_addonChanged(aId, aType, aPendingRestart) {
    // Not implemented
  },

  /**
   * Update the appDisabled property for all add-ons.
   */
  updateAddonAppDisabledStates: function MP_updateAddonAppDisabledStates() {
    // Not needed
  },

  /**
   * Called to get an AddonInstall to download and install an add-on from a URL.
   *
   * @param  aUrl
   *         The URL to be installed
   * @param  aHash
   *         A hash for the install
   * @param  aName
   *         A name for the install
   * @param  aIconURL
   *         An icon URL for the install
   * @param  aVersion
   *         A version for the install
   * @param  aLoadGroup
   *         An nsILoadGroup to associate requests with
   * @param  aCallback
   *         A callback to pass the AddonInstall to
   */
  getInstallForURL: function MP_getInstallForURL(aUrl, aHash, aName, aIconURL,
                                                  aVersion, aLoadGroup, aCallback) {
    // Not yet implemented
  },

  /**
   * Called to get an AddonInstall to install an add-on from a local file.
   *
   * @param  aFile
   *         The file to be installed
   * @param  aCallback
   *         A callback to pass the AddonInstall to
   */
  getInstallForFile: function MP_getInstallForFile(aFile, aCallback) {
    // Not yet implemented
  },

  /**
   * Called to test whether installing add-ons is enabled.
   *
   * @return true if installing is enabled
   */
  isInstallEnabled: function MP_isInstallEnabled() {
    return false;
  },

  /**
   * Called to test whether this provider supports installing a particular
   * mimetype.
   *
   * @param  aMimetype
   *         The mimetype to check for
   * @return true if the mimetype is supported
   */
  supportsMimetype: function MP_supportsMimetype(aMimetype) {
    return false;
  },

  /**
   * Called to test whether installing add-ons from a URI is allowed.
   *
   * @param  aUri
   *         The URI being installed from
   * @return true if installing is allowed
   */
  isInstallAllowed: function MP_isInstallAllowed(aUri) {
    return false;
  },


  /***** Internal functions *****/

  /**
   * Delay calling a callback to fake a time-consuming async operation.
   * The delay is specified by the apiDelay property, in milliseconds.
   * Parameters to send to the callback should be specified as arguments after
   * the aCallback argument.
   *
   * @param aCallback Callback to eventually call
   */
  _delayCallback: function MP_delayCallback(aCallback, ...aArgs) {
    if (!this.useAsyncCallbacks) {
      aCallback(...aArgs);
      return;
    }

    let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
    // Need to keep a reference to the timer, so it doesn't get GC'ed
    this.callbackTimers.push(timer);
    // Capture a stack trace where the timer was set
    // needs the 'new Error' hack until bug 1007656
    this.timerLocations.set(timer, Log.stackTrace(new Error("dummy")));
    timer.initWithCallback(() => {
      let idx = this.callbackTimers.indexOf(timer);
      if (idx == -1) {
        dump("MockProvider._delayCallback lost track of timer set at "
             + (this.timerLocations.get(timer) || "unknown location") + "\n");
      } else {
        this.callbackTimers.splice(idx, 1);
      }
      this.timerLocations.delete(timer);
      aCallback(...aArgs);
    }, this.apiDelay, timer.TYPE_ONE_SHOT);
  }
};

/***** Mock Addon object for the Mock Provider *****/

function MockAddon(aId, aName, aType, aOperationsRequiringRestart) {
  // Only set required attributes.
  this.id = aId || "";
  this.name = aName || "";
  this.type = aType || "extension";
  this.version = "";
  this.isCompatible = true;
  this.providesUpdatesSecurely = true;
  this.blocklistState = 0;
  this._appDisabled = false;
  this._userDisabled = false;
  this._applyBackgroundUpdates = AddonManager.AUTOUPDATE_ENABLE;
  this.scope = AddonManager.SCOPE_PROFILE;
  this.isActive = true;
  this.creator = "";
  this.pendingOperations = 0;
  this._permissions = AddonManager.PERM_CAN_UNINSTALL |
                      AddonManager.PERM_CAN_ENABLE |
                      AddonManager.PERM_CAN_DISABLE |
                      AddonManager.PERM_CAN_UPGRADE;
  this.operationsRequiringRestart = (aOperationsRequiringRestart != undefined) ?
    aOperationsRequiringRestart :
    (AddonManager.OP_NEEDS_RESTART_INSTALL |
     AddonManager.OP_NEEDS_RESTART_UNINSTALL |
     AddonManager.OP_NEEDS_RESTART_ENABLE |
     AddonManager.OP_NEEDS_RESTART_DISABLE);
}

MockAddon.prototype = {
  get shouldBeActive() {
    return !this.appDisabled && !this._userDisabled &&
           !(this.pendingOperations & AddonManager.PENDING_UNINSTALL);
  },

  get appDisabled() {
    return this._appDisabled;
  },

  set appDisabled(val) {
    if (val == this._appDisabled)
      return val;

    AddonManagerPrivate.callAddonListeners("onPropertyChanged", this, ["appDisabled"]);

    var currentActive = this.shouldBeActive;
    this._appDisabled = val;
    var newActive = this.shouldBeActive;
    this._updateActiveState(currentActive, newActive);

    return val;
  },

  get userDisabled() {
    return this._userDisabled;
  },

  set userDisabled(val) {
    if (val == this._userDisabled)
      return val;

    var currentActive = this.shouldBeActive;
    this._userDisabled = val;
    var newActive = this.shouldBeActive;
    this._updateActiveState(currentActive, newActive);

    return val;
  },

  get permissions() {
    let permissions = this._permissions;
    if (this.appDisabled || !this._userDisabled)
      permissions &= ~AddonManager.PERM_CAN_ENABLE;
    if (this.appDisabled || this._userDisabled)
      permissions &= ~AddonManager.PERM_CAN_DISABLE;
    return permissions;
  },

  set permissions(val) {
    return this._permissions = val;
  },

  get applyBackgroundUpdates() {
    return this._applyBackgroundUpdates;
  },

  set applyBackgroundUpdates(val) {
    if (val != AddonManager.AUTOUPDATE_DEFAULT &&
        val != AddonManager.AUTOUPDATE_DISABLE &&
        val != AddonManager.AUTOUPDATE_ENABLE) {
      ok(false, "addon.applyBackgroundUpdates set to an invalid value: " + val);
    }
    this._applyBackgroundUpdates = val;
    AddonManagerPrivate.callAddonListeners("onPropertyChanged", this, ["applyBackgroundUpdates"]);
  },

  isCompatibleWith: function(aAppVersion, aPlatformVersion) {
    return true;
  },

  findUpdates: function(aListener, aReason, aAppVersion, aPlatformVersion) {
    // Tests can implement this if they need to
  },

  uninstall: function(aAlwaysAllowUndo = false) {
    if ((this.operationsRequiringRestart & AddonManager.OP_NEED_RESTART_UNINSTALL)
        && this.pendingOperations & AddonManager.PENDING_UNINSTALL)
      throw Components.Exception("Add-on is already pending uninstall");

    var needsRestart = aAlwaysAllowUndo || !!(this.operationsRequiringRestart & AddonManager.OP_NEEDS_RESTART_UNINSTALL);
    this.pendingOperations |= AddonManager.PENDING_UNINSTALL;
    AddonManagerPrivate.callAddonListeners("onUninstalling", this, needsRestart);
    if (!needsRestart) {
      this.pendingOperations -= AddonManager.PENDING_UNINSTALL;
      this._provider.removeAddon(this);
    } else if (!(this.operationsRequiringRestart & AddonManager.OP_NEEDS_RESTART_DISABLE)) {
      this.isActive = false;
    }
  },

  cancelUninstall: function() {
    if (!(this.pendingOperations & AddonManager.PENDING_UNINSTALL))
      throw Components.Exception("Add-on is not pending uninstall");

    this.pendingOperations -= AddonManager.PENDING_UNINSTALL;
    this.isActive = this.shouldBeActive;
    AddonManagerPrivate.callAddonListeners("onOperationCancelled", this);
  },

  markAsSeen: function() {
    this.seen = true;
  },

  _updateActiveState: function(currentActive, newActive) {
    if (currentActive == newActive)
      return;

    if (newActive == this.isActive) {
      this.pendingOperations -= (newActive ? AddonManager.PENDING_DISABLE : AddonManager.PENDING_ENABLE);
      AddonManagerPrivate.callAddonListeners("onOperationCancelled", this);
    }
    else if (newActive) {
      let needsRestart = !!(this.operationsRequiringRestart & AddonManager.OP_NEEDS_RESTART_ENABLE);
      this.pendingOperations |= AddonManager.PENDING_ENABLE;
      AddonManagerPrivate.callAddonListeners("onEnabling", this, needsRestart);
      if (!needsRestart) {
        this.isActive = newActive;
        this.pendingOperations -= AddonManager.PENDING_ENABLE;
        AddonManagerPrivate.callAddonListeners("onEnabled", this);
      }
    }
    else {
      let needsRestart = !!(this.operationsRequiringRestart & AddonManager.OP_NEEDS_RESTART_DISABLE);
      this.pendingOperations |= AddonManager.PENDING_DISABLE;
      AddonManagerPrivate.callAddonListeners("onDisabling", this, needsRestart);
      if (!needsRestart) {
        this.isActive = newActive;
        this.pendingOperations -= AddonManager.PENDING_DISABLE;
        AddonManagerPrivate.callAddonListeners("onDisabled", this);
      }
    }
  }
};

/***** Mock AddonInstall object for the Mock Provider *****/

function MockInstall(aName, aType, aAddonToInstall) {
  this.name = aName || "";
  // Don't expose type until download completed
  this._type = aType || "extension";
  this.type = null;
  this.version = "1.0";
  this.iconURL = "";
  this.infoURL = "";
  this.state = AddonManager.STATE_AVAILABLE;
  this.error = 0;
  this.sourceURI = null;
  this.file = null;
  this.progress = 0;
  this.maxProgress = -1;
  this.certificate = null;
  this.certName = "";
  this.existingAddon = null;
  this.addon = null;
  this._addonToInstall = aAddonToInstall;
  this.listeners = [];

  // Another type of install listener for tests that want to check the results
  // of code run from standard install listeners
  this.testListeners = [];
}

MockInstall.prototype = {
  install: function() {
    switch (this.state) {
      case AddonManager.STATE_AVAILABLE:
        this.state = AddonManager.STATE_DOWNLOADING;
        if (!this.callListeners("onDownloadStarted")) {
          this.state = AddonManager.STATE_CANCELLED;
          this.callListeners("onDownloadCancelled");
          return;
        }

        this.type = this._type;

        // Adding addon to MockProvider to be implemented when needed
        if (this._addonToInstall)
          this.addon = this._addonToInstall;
        else {
          this.addon = new MockAddon("", this.name, this.type);
          this.addon.version = this.version;
          this.addon.pendingOperations = AddonManager.PENDING_INSTALL;
        }
        this.addon.install = this;
        if (this.existingAddon) {
          if (!this.addon.id)
            this.addon.id = this.existingAddon.id;
          this.existingAddon.pendingUpgrade = this.addon;
          this.existingAddon.pendingOperations |= AddonManager.PENDING_UPGRADE;
        }

        this.state = AddonManager.STATE_DOWNLOADED;
        this.callListeners("onDownloadEnded");

      case AddonManager.STATE_DOWNLOADED:
        this.state = AddonManager.STATE_INSTALLING;
        if (!this.callListeners("onInstallStarted")) {
          this.state = AddonManager.STATE_CANCELLED;
          this.callListeners("onInstallCancelled");
          return;
        }

        let needsRestart = (this.operationsRequiringRestart & AddonManager.OP_NEEDS_RESTART_INSTALL);
        AddonManagerPrivate.callAddonListeners("onInstalling", this.addon, needsRestart);
        if (!needsRestart) {
          AddonManagerPrivate.callAddonListeners("onInstalled", this.addon);
        }

        this.state = AddonManager.STATE_INSTALLED;
        this.callListeners("onInstallEnded");
        break;
      case AddonManager.STATE_DOWNLOADING:
      case AddonManager.STATE_CHECKING:
      case AddonManager.STATE_INSTALLING:
        // Installation is already running
        return;
      default:
        ok(false, "Cannot start installing when state = " + this.state);
    }
  },

  cancel: function() {
    switch (this.state) {
      case AddonManager.STATE_AVAILABLE:
        this.state = AddonManager.STATE_CANCELLED;
        break;
      case AddonManager.STATE_INSTALLED:
        this.state = AddonManager.STATE_CANCELLED;
        this._provider.removeInstall(this);
        this.callListeners("onInstallCancelled");
        break;
      default:
        // Handling cancelling when downloading to be implemented when needed
        ok(false, "Cannot cancel when state = " + this.state);
    }
  },


  addListener: function(aListener) {
    if (!this.listeners.some(i => i == aListener))
      this.listeners.push(aListener);
  },

  removeListener: function(aListener) {
    this.listeners = this.listeners.filter(i => i != aListener);
  },

  addTestListener: function(aListener) {
    if (!this.testListeners.some(i => i == aListener))
      this.testListeners.push(aListener);
  },

  removeTestListener: function(aListener) {
    this.testListeners = this.testListeners.filter(i => i != aListener);
  },

  callListeners: function(aMethod) {
    var result = AddonManagerPrivate.callInstallListeners(aMethod, this.listeners,
                                                          this, this.addon);

    // Call test listeners after standard listeners to remove race condition
    // between standard and test listeners
    for (let listener of this.testListeners) {
      try {
        if (aMethod in listener)
          if (listener[aMethod].call(listener, this, this.addon) === false)
            result = false;
      }
      catch (e) {
        ok(false, "Test listener threw exception: " + e);
      }
    }

    return result;
  }
};

function waitForCondition(condition, nextTest, errorMsg) {
  let tries = 0;
  let interval = setInterval(function() {
    if (tries >= 30) {
      ok(false, errorMsg);
      moveOn();
    }
    var conditionPassed;
    try {
      conditionPassed = condition();
    } catch (e) {
      ok(false, e + "\n" + e.stack);
      conditionPassed = false;
    }
    if (conditionPassed) {
      moveOn();
    }
    tries++;
  }, 100);
  let moveOn = function() { clearInterval(interval); nextTest(); };
}

function getTestPluginTag() {
  let ph = Cc["@mozilla.org/plugin/host;1"].getService(Ci.nsIPluginHost);
  let tags = ph.getPluginTags();

  // Find the test plugin
  for (let i = 0; i < tags.length; i++) {
    if (tags[i].name == "Test Plug-in")
      return tags[i];
  }
  ok(false, "Unable to find plugin");
  return null;
}
