import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

toolkit/components/places/tests/unit/test_history_notifications.js

@@ -0,0 +1,38 @@
+const NS_PLACES_INIT_COMPLETE_TOPIC = "places-init-complete";
+const NS_PLACES_DATABASE_LOCKED_TOPIC = "places-database-locked";
+
+add_task(function* () {
+  // Create a dummy places.sqlite and open an unshared connection on it
+  let db = Services.dirsvc.get('ProfD', Ci.nsIFile);
+  db.append("places.sqlite");
+  let dbConn = Services.storage.openUnsharedDatabase(db);
+  Assert.ok(db.exists(), "The database should have been created");
+
+  // We need an exclusive lock on the db
+  dbConn.executeSimpleSQL("PRAGMA locking_mode = EXCLUSIVE");
+  // Exclusive locking is lazy applied, we need to make a write to activate it
+  dbConn.executeSimpleSQL("PRAGMA USER_VERSION = 1");
+
+  // Try to create history service while the db is locked
+  let promiseLocked = promiseTopicObserved(NS_PLACES_DATABASE_LOCKED_TOPIC);
+  Assert.throws(() => Cc["@mozilla.org/browser/nav-history-service;1"]
+                        .getService(Ci.nsINavHistoryService),
+                /NS_ERROR_XPC_GS_RETURNED_FAILURE/);
+  yield promiseLocked;
+
+  // Close our connection and try to cleanup the file (could fail on Windows)
+  dbConn.close();
+  if (db.exists()) {
+    try {
+      db.remove(false);
+    } catch (e) {
+      do_print("Unable to remove dummy places.sqlite");
+    }
+  }
+
+  // Create history service correctly
+  let promiseComplete = promiseTopicObserved(NS_PLACES_INIT_COMPLETE_TOPIC);
+  Cc["@mozilla.org/browser/nav-history-service;1"]
+    .getService(Ci.nsINavHistoryService);
+  yield promiseComplete;
+});