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 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-

  * vim: sw=2 ts=2 sts=2

  * 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/. */

 /**

  * Test added with bug 460086 to test the behavior of the new API that was added

  * to remove all traces of visiting a site.

  */

 ////////////////////////////////////////////////////////////////////////////////

 //// Globals

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

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

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

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

 XPCOMUtils.defineLazyModuleGetter(this, "Promise",

                                   "resource://gre/modules/Promise.jsm");

 const COOKIE_EXPIRY = Math.round(Date.now() / 1000) + 60;

 const COOKIE_NAME = "testcookie";

 const COOKIE_PATH = "/";

 const LOGIN_USERNAME = "username";

 const LOGIN_PASSWORD = "password";

 const LOGIN_USERNAME_FIELD = "username_field";

 const LOGIN_PASSWORD_FIELD = "password_field";

 const PERMISSION_TYPE = "test-perm";

 const PERMISSION_VALUE = Ci.nsIPermissionManager.ALLOW_ACTION;

 const PREFERENCE_NAME = "test-pref";

 ////////////////////////////////////////////////////////////////////////////////

 //// Utility Functions

 /**

  * Creates an nsIURI object for the given string representation of a URI.

  *

  * @param aURIString

  *        The spec of the URI to create.

  * @returns an nsIURI representing aURIString.

  */

 function uri(aURIString)

 {

   return Cc["@mozilla.org/network/io-service;1"].

          getService(Ci.nsIIOService).

          newURI(aURIString, null, null);

 }

 /**

  * Asynchronously adds visits to a page.

  *

  * @param aPlaceInfo

  *        Can be an nsIURI, in such a case a single LINK visit will be added.

  *        Otherwise can be an object describing the visit to add, or an array

  *        of these objects:

  *          { uri: nsIURI of the page,

  *            transition: one of the TRANSITION_* from nsINavHistoryService,

  *            [optional] title: title of the page,

  *            [optional] visitDate: visit date in microseconds from the epoch

  *            [optional] referrer: nsIURI of the referrer for this visit

  *          }

  *

  * @return {Promise}

  * @resolves When all visits have been added successfully.

  * @rejects JavaScript exception.

  */

 function promiseAddVisits(aPlaceInfo)

 {

   let deferred = Promise.defer();

   let places = [];

   if (aPlaceInfo instanceof Ci.nsIURI) {

     places.push({ uri: aPlaceInfo });

   }

   else if (Array.isArray(aPlaceInfo)) {

     places = places.concat(aPlaceInfo);

   } else {

     places.push(aPlaceInfo)

   }

   // Create mozIVisitInfo for each entry.

   let now = Date.now();

   for (let i = 0; i < places.length; i++) {

     if (!places[i].title) {

       places[i].title = "test visit for " + places[i].uri.spec;

     }

     places[i].visits = [{

       transitionType: places[i].transition === undefined ? Ci.nsINavHistoryService.TRANSITION_LINK

                                                          : places[i].transition,

       visitDate: places[i].visitDate || (now++) * 1000,

       referrerURI: places[i].referrer

     }];

   }

   PlacesUtils.asyncHistory.updatePlaces(

     places,

     {

       handleError: function handleError(aResultCode, aPlaceInfo) {

         let ex = new Components.Exception("Unexpected error in adding visits.",

                                           aResultCode);

         deferred.reject(ex);

       },

       handleResult: function () {},

       handleCompletion: function handleCompletion() {

         deferred.resolve();

       }

     }

   );

   return deferred.promise;

 }

 /**

  * Asynchronously check a url is visited.

  *

  * @param aURI

  *        The URI.

  *

  * @return {Promise}

  * @resolves When the check has been added successfully.

  * @rejects JavaScript exception.

  */

 function promiseIsURIVisited(aURI)

 {

   let deferred = Promise.defer();

   PlacesUtils.asyncHistory.isURIVisited(aURI, function(aURI, aIsVisited) {

     deferred.resolve(aIsVisited);

   });

   return deferred.promise;

 }

 /**

  * Add a cookie to the cookie service.

  *

  * @param aDomain

  */

 function add_cookie(aDomain)

 {

   check_cookie_exists(aDomain, false);

   let cm = Cc["@mozilla.org/cookiemanager;1"].getService(Ci.nsICookieManager2);

   cm.add(aDomain, COOKIE_PATH, COOKIE_NAME, "", false, false, false,

          COOKIE_EXPIRY);

   check_cookie_exists(aDomain, true);

 }

 /**

  * Checks to ensure that a cookie exists or not for a domain.

  *

  * @param aDomain

  *        The domain to check for the cookie.

  * @param aExists

  *        True if the cookie should exist, false otherwise.

  */

 function check_cookie_exists(aDomain, aExists)

 {

   let cm = Cc["@mozilla.org/cookiemanager;1"].getService(Ci.nsICookieManager2);

   let cookie = {

     host: aDomain,

     name: COOKIE_NAME,

     path: COOKIE_PATH

   }

   let checker = aExists ? do_check_true : do_check_false;

   checker(cm.cookieExists(cookie));

 }

 /**

  * Adds a download to download history.

  *

  * @param aURIString

  *        The string of the URI to add.

  * @param aIsActive

  *        If it should be set to an active state in the database.  This does not

  *        make it show up in the list of active downloads however!

  */

 function add_download(aURIString, aIsActive)

 {

   function makeGUID() {

     let guid = "";

     for (var i = 0; i < 12; i++)

       guid += Math.floor(Math.random() * 10);

     return guid;

   }

   check_downloaded(aURIString, false);

   let db = Cc["@mozilla.org/download-manager;1"].

            getService(Ci.nsIDownloadManager).

            DBConnection;

   let stmt = db.createStatement(

     "INSERT INTO moz_downloads (source, state, guid) " +

     "VALUES (:source, :state, :guid)"

   );

   stmt.params.source = aURIString;

   stmt.params.state = aIsActive ? Ci.nsIDownloadManager.DOWNLOAD_DOWNLOADING :

                                   Ci.nsIDownloadManager.DOWNLOAD_FINISHED;

   stmt.params.guid = makeGUID();

   try {

     stmt.execute();

   }

   finally {

     stmt.finalize();

   }

   check_downloaded(aURIString, true);

 }

 /**

  * Checks to ensure a URI string is in download history or not.

  *

  * @param aURIString

  *        The string of the URI to check.

  * @param aIsDownloaded

  *        True if the URI should be downloaded, false otherwise.

  */

 function check_downloaded(aURIString, aIsDownloaded)

 {

   let db = Cc["@mozilla.org/download-manager;1"].

            getService(Ci.nsIDownloadManager).

            DBConnection;

   let stmt = db.createStatement(

     "SELECT * " +

     "FROM moz_downloads " +

     "WHERE source = :source"

   );

   stmt.params.source = aURIString;

   let checker = aIsDownloaded ? do_check_true : do_check_false;

   try {

     checker(stmt.executeStep());

   }

   finally {

     stmt.finalize();

   }

 }

 /**

  * Adds a disabled host to the login manager.

  *

  * @param aHost

  *        The host to add to the list of disabled hosts.

  */

 function add_disabled_host(aHost)

 {

   check_disabled_host(aHost, false);

   let lm = Cc["@mozilla.org/login-manager;1"].

            getService(Ci.nsILoginManager);

   lm.setLoginSavingEnabled(aHost, false);

   check_disabled_host(aHost, true);

 }

 /**

  * Checks to see if a host is disabled for storing logins or not.

  *

  * @param aHost

  *        The host to check if it is disabled.

  * @param aIsDisabled

  *        True if the host should be disabled, false otherwise.

  */

 function check_disabled_host(aHost, aIsDisabled)

 {

   let lm = Cc["@mozilla.org/login-manager;1"].

            getService(Ci.nsILoginManager);

   let checker = aIsDisabled ? do_check_false : do_check_true;

   checker(lm.getLoginSavingEnabled(aHost));

 }

 /**

  * Adds a login for the specified host to the login manager.

  *

  * @param aHost

  *        The host to add the login for.

  */

 function add_login(aHost)

 {

   check_login_exists(aHost, false);

   let login = Cc["@mozilla.org/login-manager/loginInfo;1"].

               createInstance(Ci.nsILoginInfo);

   login.init(aHost, "", null, LOGIN_USERNAME, LOGIN_PASSWORD,

              LOGIN_USERNAME_FIELD, LOGIN_PASSWORD_FIELD);

   let lm = Cc["@mozilla.org/login-manager;1"].

            getService(Ci.nsILoginManager);

   lm.addLogin(login);

   check_login_exists(aHost, true);

 }

 /**

  * Checks to see if a login exists for a host.

  *

  * @param aHost

  *        The host to check for the test login.

  * @param aExists

  *        True if the login should exist, false otherwise.

  */

 function check_login_exists(aHost, aExists)

 {

   let lm = Cc["@mozilla.org/login-manager;1"].

            getService(Ci.nsILoginManager);

   let count = { value: 0 };

   lm.findLogins(count, aHost, "", null);

   do_check_eq(count.value, aExists ? 1 : 0);

 }

 /**

  * Adds a permission for the specified URI to the permission manager.

  *

  * @param aURI

  *        The URI to add the test permission for.

  */

 function add_permission(aURI)

 {

   check_permission_exists(aURI, false);

   let pm = Cc["@mozilla.org/permissionmanager;1"].

            getService(Ci.nsIPermissionManager);

   let principal = Cc["@mozilla.org/scriptsecuritymanager;1"]

                     .getService(Ci.nsIScriptSecurityManager)

                     .getNoAppCodebasePrincipal(aURI);

   pm.addFromPrincipal(principal, PERMISSION_TYPE, PERMISSION_VALUE);

   check_permission_exists(aURI, true);

 }

 /**

  * Checks to see if a permission exists for the given URI.

  *

  * @param aURI

  *        The URI to check if a permission exists.

  * @param aExists

  *        True if the permission should exist, false otherwise.

  */

 function check_permission_exists(aURI, aExists)

 {

   let pm = Cc["@mozilla.org/permissionmanager;1"].

            getService(Ci.nsIPermissionManager);

   let principal = Cc["@mozilla.org/scriptsecuritymanager;1"]

                     .getService(Ci.nsIScriptSecurityManager)

                     .getNoAppCodebasePrincipal(aURI);

   let perm = pm.testExactPermissionFromPrincipal(principal, PERMISSION_TYPE);

   let checker = aExists ? do_check_eq : do_check_neq;

   checker(perm, PERMISSION_VALUE);

 }

 /**

  * Adds a content preference for the specified URI.

  *

  * @param aURI

  *        The URI to add a preference for.

  */

 function add_preference(aURI)

 {

   let deferred = Promise.defer();

   let cp = Cc["@mozilla.org/content-pref/service;1"].

              getService(Ci.nsIContentPrefService2);

   cp.set(aURI.spec, PREFERENCE_NAME, "foo", null, {

     handleCompletion: function() deferred.resolve()

   });

   return deferred.promise;

 }

 /**

  * Checks to see if a content preference exists for the given URI.

  *

  * @param aURI

  *        The URI to check if a preference exists.

  */

 function preference_exists(aURI)

 {

   let deferred = Promise.defer();

   let cp = Cc["@mozilla.org/content-pref/service;1"].

              getService(Ci.nsIContentPrefService2);

   let exists = false;

   cp.getByDomainAndName(aURI.spec, PREFERENCE_NAME, null, {

     handleResult: function() exists = true,

     handleCompletion: function() deferred.resolve(exists)

   });

   return deferred.promise;

 }

 ////////////////////////////////////////////////////////////////////////////////

 //// Test Functions

 // History

 function test_history_cleared_with_direct_match()

 {

   const TEST_URI = uri("http://mozilla.org/foo");

   do_check_false(yield promiseIsURIVisited(TEST_URI));

   yield promiseAddVisits(TEST_URI);

   do_check_true(yield promiseIsURIVisited(TEST_URI));

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   do_check_false(yield promiseIsURIVisited(TEST_URI));

 }

 function test_history_cleared_with_subdomain()

 {

   const TEST_URI = uri("http://www.mozilla.org/foo");

   do_check_false(yield promiseIsURIVisited(TEST_URI));

   yield promiseAddVisits(TEST_URI);

   do_check_true(yield promiseIsURIVisited(TEST_URI));

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   do_check_false(yield promiseIsURIVisited(TEST_URI));

 }

 function test_history_not_cleared_with_uri_contains_domain()

 {

   const TEST_URI = uri("http://ilovemozilla.org/foo");

   do_check_false(yield promiseIsURIVisited(TEST_URI));

   yield promiseAddVisits(TEST_URI);

   do_check_true(yield promiseIsURIVisited(TEST_URI));

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   do_check_true(yield promiseIsURIVisited(TEST_URI));

   // Clear history since we left something there from this test.

   PlacesUtils.bhistory.removeAllPages();

 }

 // Cookie Service

 function test_cookie_cleared_with_direct_match()

 {

   const TEST_DOMAIN = "mozilla.org";

   add_cookie(TEST_DOMAIN);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_cookie_exists(TEST_DOMAIN, false);

 }

 function test_cookie_cleared_with_subdomain()

 {

   const TEST_DOMAIN = "www.mozilla.org";

   add_cookie(TEST_DOMAIN);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_cookie_exists(TEST_DOMAIN, false);

 }

 function test_cookie_not_cleared_with_uri_contains_domain()

 {

   const TEST_DOMAIN = "ilovemozilla.org";

   add_cookie(TEST_DOMAIN);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_cookie_exists(TEST_DOMAIN, true);

 }

 // Download Manager

 function test_download_history_cleared_with_direct_match()

 {

   if (oldDownloadManagerDisabled()) {

     return;

   }

   const TEST_URI = "http://mozilla.org/foo";

   add_download(TEST_URI, false);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_downloaded(TEST_URI, false);

 }

 function test_download_history_cleared_with_subdomain()

 {

   if (oldDownloadManagerDisabled()) {

     return;

   }

   const TEST_URI = "http://www.mozilla.org/foo";

   add_download(TEST_URI, false);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_downloaded(TEST_URI, false);

 }

 function test_download_history_not_cleared_with_active_direct_match()

 {

   if (oldDownloadManagerDisabled()) {

     return;

   }

   // Tests that downloads marked as active in the db are not deleted from the db

   const TEST_URI = "http://mozilla.org/foo";

   add_download(TEST_URI, true);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_downloaded(TEST_URI, true);

   // Reset state

   let db = Cc["@mozilla.org/download-manager;1"].

            getService(Ci.nsIDownloadManager).

            DBConnection;

   db.executeSimpleSQL("DELETE FROM moz_downloads");

   check_downloaded(TEST_URI, false);

 }

 // Login Manager

 function test_login_manager_disabled_hosts_cleared_with_direct_match()

 {

   const TEST_HOST = "http://mozilla.org";

   add_disabled_host(TEST_HOST);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_disabled_host(TEST_HOST, false);

 }

 function test_login_manager_disabled_hosts_cleared_with_subdomain()

 {

   const TEST_HOST = "http://www.mozilla.org";

   add_disabled_host(TEST_HOST);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_disabled_host(TEST_HOST, false);

 }

 function test_login_manager_disabled_hosts_not_cleared_with_uri_contains_domain()

 {

   const TEST_HOST = "http://ilovemozilla.org";

   add_disabled_host(TEST_HOST);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_disabled_host(TEST_HOST, true);

   // Reset state

   let lm = Cc["@mozilla.org/login-manager;1"].

            getService(Ci.nsILoginManager);

   lm.setLoginSavingEnabled(TEST_HOST, true);

   check_disabled_host(TEST_HOST, false);

 }

 function test_login_manager_logins_cleared_with_direct_match()

 {

   const TEST_HOST = "http://mozilla.org";

   add_login(TEST_HOST);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_login_exists(TEST_HOST, false);

 }

 function test_login_manager_logins_cleared_with_subdomain()

 {

   const TEST_HOST = "http://www.mozilla.org";

   add_login(TEST_HOST);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_login_exists(TEST_HOST, false);

 }

 function tets_login_manager_logins_not_cleared_with_uri_contains_domain()

 {

   const TEST_HOST = "http://ilovemozilla.org";

   add_login(TEST_HOST);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_login_exists(TEST_HOST, true);

   let lm = Cc["@mozilla.org/login-manager;1"].

            getService(Ci.nsILoginManager);

   lm.removeAllLogins();

   check_login_exists(TEST_HOST, false);

 }

 // Permission Manager

 function test_permission_manager_cleared_with_direct_match()

 {

   const TEST_URI = uri("http://mozilla.org");

   add_permission(TEST_URI);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_permission_exists(TEST_URI, false);

 }

 function test_permission_manager_cleared_with_subdomain()

 {

   const TEST_URI = uri("http://www.mozilla.org");

   add_permission(TEST_URI);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_permission_exists(TEST_URI, false);

 }

 function test_permission_manager_not_cleared_with_uri_contains_domain()

 {

   const TEST_URI = uri("http://ilovemozilla.org");

   add_permission(TEST_URI);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   check_permission_exists(TEST_URI, true);

   // Reset state

   let pm = Cc["@mozilla.org/permissionmanager;1"].

            getService(Ci.nsIPermissionManager);

   pm.removeAll();

   check_permission_exists(TEST_URI, false);

 }

 function waitForPurgeNotification() {

   let deferred = Promise.defer();

   let observer = {

     observe: function(aSubject, aTopic, aData)

     {

       Services.obs.removeObserver(observer, "browser:purge-domain-data");

       // test_storage_cleared needs this extra executeSoon because

       // the DOMStorage clean-up is also listening to this same observer

       // which is run synchronously.

       Services.tm.mainThread.dispatch(function() {

         deferred.resolve();

       }, Components.interfaces.nsIThread.DISPATCH_NORMAL);

     }

   };

   Services.obs.addObserver(observer, "browser:purge-domain-data", false);

   return deferred.promise;

 }

 // Content Preferences

 function test_content_preferences_cleared_with_direct_match()

 {

   const TEST_URI = uri("http://mozilla.org");

   do_check_false(yield preference_exists(TEST_URI));

   yield add_preference(TEST_URI);

   do_check_true(yield preference_exists(TEST_URI));

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   yield waitForPurgeNotification();

   do_check_false(yield preference_exists(TEST_URI));

 }

 function test_content_preferences_cleared_with_subdomain()

 {

   const TEST_URI = uri("http://www.mozilla.org");

   do_check_false(yield preference_exists(TEST_URI));

   yield add_preference(TEST_URI);

   do_check_true(yield preference_exists(TEST_URI));

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   yield waitForPurgeNotification();

   do_check_false(yield preference_exists(TEST_URI));

 }

 function test_content_preferences_not_cleared_with_uri_contains_domain()

 {

   const TEST_URI = uri("http://ilovemozilla.org");

   do_check_false(yield preference_exists(TEST_URI));

   yield add_preference(TEST_URI);

   do_check_true(yield preference_exists(TEST_URI));

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   yield waitForPurgeNotification();

   do_check_true(yield preference_exists(TEST_URI));

   // Reset state

   ForgetAboutSite.removeDataFromDomain("ilovemozilla.org");

   yield waitForPurgeNotification();

   do_check_false(yield preference_exists(TEST_URI));

 }

 // Cache

 function test_cache_cleared()

 {

   // Because this test is asynchronous, it should be the last test

   do_check_true(tests[tests.length - 1] == arguments.callee);

   // NOTE: We could be more extensive with this test and actually add an entry

   //       to the cache, and then make sure it is gone.  However, we trust that

   //       the API is well tested, and that when we get the observer

   //       notification, we have actually cleared the cache.

   // This seems to happen asynchronously...

   let os = Cc["@mozilla.org/observer-service;1"].

            getService(Ci.nsIObserverService);

   let observer = {

     observe: function(aSubject, aTopic, aData)

     {

       os.removeObserver(observer, "cacheservice:empty-cache");

       // Shutdown the download manager.

       Services.obs.notifyObservers(null, "quit-application", null);

       do_test_finished();

     }

   };

   os.addObserver(observer, "cacheservice:empty-cache", false);

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   do_test_pending();

 }

 function test_storage_cleared()

 {

   function getStorageForURI(aURI)

   {

     let principal = Cc["@mozilla.org/scriptsecuritymanager;1"].

                     getService(Ci.nsIScriptSecurityManager).

                     getNoAppCodebasePrincipal(aURI);

     let dsm = Cc["@mozilla.org/dom/localStorage-manager;1"].

               getService(Ci.nsIDOMStorageManager);

     return dsm.createStorage(principal, "");

   }

   let s = [

     getStorageForURI(uri("http://mozilla.org")),

     getStorageForURI(uri("http://my.mozilla.org")),

     getStorageForURI(uri("http://ilovemozilla.org")),

   ];

   for (let i = 0; i < s.length; ++i) {

     let storage = s[i];

     storage.setItem("test", "value" + i);

     do_check_eq(storage.length, 1);

     do_check_eq(storage.key(0), "test");

     do_check_eq(storage.getItem("test"), "value" + i);

   }

   ForgetAboutSite.removeDataFromDomain("mozilla.org");

   yield waitForPurgeNotification();

   do_check_eq(s[0].getItem("test"), null);

   do_check_eq(s[0].length, 0);

   do_check_eq(s[1].getItem("test"), null);

   do_check_eq(s[1].length, 0);

   do_check_eq(s[2].getItem("test"), "value2");

   do_check_eq(s[2].length, 1);

 }

 let tests = [

   // History

   test_history_cleared_with_direct_match,

   test_history_cleared_with_subdomain,

   test_history_not_cleared_with_uri_contains_domain,

   // Cookie Service

   test_cookie_cleared_with_direct_match,

   test_cookie_cleared_with_subdomain,

   test_cookie_not_cleared_with_uri_contains_domain,

   // Download Manager

   // Note: active downloads tested in test_removeDataFromDomain_activeDownloads.js

   test_download_history_cleared_with_direct_match,

   test_download_history_cleared_with_subdomain,

   test_download_history_not_cleared_with_active_direct_match,

   // Login Manager

   test_login_manager_disabled_hosts_cleared_with_direct_match,

   test_login_manager_disabled_hosts_cleared_with_subdomain,

   test_login_manager_disabled_hosts_not_cleared_with_uri_contains_domain,

   test_login_manager_logins_cleared_with_direct_match,

   test_login_manager_logins_cleared_with_subdomain,

   tets_login_manager_logins_not_cleared_with_uri_contains_domain,

   // Permission Manager

   test_permission_manager_cleared_with_direct_match,

   test_permission_manager_cleared_with_subdomain,

   test_permission_manager_not_cleared_with_uri_contains_domain,

   // Content Preferences

   test_content_preferences_cleared_with_direct_match,

   test_content_preferences_cleared_with_subdomain,

   test_content_preferences_not_cleared_with_uri_contains_domain,

   // Storage

   test_storage_cleared,

   // Cache

   test_cache_cleared,

 ];

 function run_test()

 {

   for (let i = 0; i < tests.length; i++)

     add_task(tests[i]);

   run_next_test();

 }