diff -r 000000000000 -r 6474c204b198 toolkit/components/places/tests/expiration/head_expiration.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/places/tests/expiration/head_expiration.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,119 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
+ * 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 Ci = Components.interfaces;
+const Cc = Components.classes;
+const Cr = Components.results;
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/Services.jsm");
+
+// Import common head.
+let (commonFile = do_get_file("../head_common.js", false)) {
+  let uri = Services.io.newFileURI(commonFile);
+  Services.scriptloader.loadSubScript(uri.spec, this);
+}
+
+// Put any other stuff relative to this test folder below.
+
+
+// Simulates an expiration at shutdown.
+function shutdownExpiration()
+{
+  let expire = Cc["@mozilla.org/places/expiration;1"].getService(Ci.nsIObserver);
+  expire.observe(null, "places-will-close-connection", null);
+}
+
+
+/**
+ * Causes expiration component to start, otherwise it would wait for the first
+ * history notification.
+ */
+function force_expiration_start() {
+  Cc["@mozilla.org/places/expiration;1"].getService(Ci.nsISupports);
+}
+
+
+/**
+ * Forces an expiration run.
+ *
+ * @param [optional] aLimit
+ *        Limit for the expiration.  Pass -1 for unlimited.
+ *        Any other non-positive value will just expire orphans.
+ *
+ * @return {Promise}
+ * @resolves When expiration finishes.
+ * @rejects Never.
+ */
+function promiseForceExpirationStep(aLimit) {
+  let promise = promiseTopicObserved(PlacesUtils.TOPIC_EXPIRATION_FINISHED);
+  let expire = Cc["@mozilla.org/places/expiration;1"].getService(Ci.nsIObserver);
+  expire.observe(null, "places-debug-start-expiration", aLimit);
+  return promise;
+}
+
+
+/**
+ * Expiration preferences helpers.
+ */
+
+function setInterval(aNewInterval) {
+  Services.prefs.setIntPref("places.history.expiration.interval_seconds", aNewInterval);
+}
+function getInterval() {
+  return Services.prefs.getIntPref("places.history.expiration.interval_seconds");
+}
+function clearInterval() {
+  try {
+    Services.prefs.clearUserPref("places.history.expiration.interval_seconds");
+  }
+  catch(ex) {}
+}
+
+
+function setMaxPages(aNewMaxPages) {
+  Services.prefs.setIntPref("places.history.expiration.max_pages", aNewMaxPages);
+}
+function getMaxPages() {
+  return Services.prefs.getIntPref("places.history.expiration.max_pages");
+}
+function clearMaxPages() {
+  try {
+    Services.prefs.clearUserPref("places.history.expiration.max_pages");
+  }
+  catch(ex) {}
+}
+
+
+function setHistoryEnabled(aHistoryEnabled) {
+  Services.prefs.setBoolPref("places.history.enabled", aHistoryEnabled);
+}
+function getHistoryEnabled() {
+  return Services.prefs.getBoolPref("places.history.enabled");
+}
+function clearHistoryEnabled() {
+  try {
+    Services.prefs.clearUserPref("places.history.enabled");
+  }
+  catch(ex) {}
+}
+
+/**
+ * Returns a PRTime in the past usable to add expirable visits.
+ *
+ * @note Expiration ignores any visit added in the last 7 days, but it's
+ *       better be safe against DST issues, by going back one day more.
+ */
+function getExpirablePRTime() {
+  let dateObj = new Date();
+  // Normalize to midnight
+  dateObj.setHours(0);
+  dateObj.setMinutes(0);
+  dateObj.setSeconds(0);
+  dateObj.setMilliseconds(0);
+  dateObj = new Date(dateObj.getTime() - 8 * 86400000);
+  return dateObj.getTime() * 1000;
+}