1 files changed, 50 insertions, 0 deletions
diff --git a/toolkit/components/places/tests/unit/test_history_notifications.js b/toolkit/components/places/tests/unit/test_history_notifications.js
new file mode 100644
index 0000000000..339080b042
--- /dev/null
+++ b/toolkit/components/places/tests/unit/test_history_notifications.js
@@ -0,0 +1,50 @@
+const NS_PLACES_INIT_COMPLETE_TOPIC = "places-init-complete";
+let gLockedConn;
+
+add_task(async function setup() {
+  // Create a dummy places.sqlite and open an unshared connection on it
+  let db = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  db.append("places.sqlite");
+  gLockedConn = Services.storage.openUnsharedDatabase(db);
+  Assert.ok(db.exists(), "The database should have been created");
+
+  // We need an exclusive lock on the db
+  gLockedConn.executeSimpleSQL("PRAGMA locking_mode = EXCLUSIVE");
+  // Exclusive locking is lazy applied, we need to make a write to activate it
+  gLockedConn.executeSimpleSQL("PRAGMA USER_VERSION = 1");
+});
+
+add_task(async function locked() {
+  // Try to create history service while the db is locked.
+  // It should be possible to create the service, but any method using the
+  // database will fail.
+  let resolved = false;
+  let promiseComplete = promiseTopicObserved(
+    NS_PLACES_INIT_COMPLETE_TOPIC
+  ).then(() => (resolved = true));
+  let history = Cc["@mozilla.org/browser/nav-history-service;1"].createInstance(
+    Ci.nsINavHistoryService
+  );
+  // The notification shouldn't happen until something tries to use the database.
+  await new Promise(resolve => do_timeout(100, resolve));
+  Assert.equal(
+    resolved,
+    false,
+    "The notification should not have been fired yet"
+  );
+  // This will initialize the database.
+  Assert.equal(history.databaseStatus, history.DATABASE_STATUS_LOCKED);
+  await promiseComplete;
+
+  // Close our connection and try to cleanup the file (could fail on Windows)
+  gLockedConn.close();
+  let db = Services.dirsvc.get("ProfD", Ci.nsIFile);
+  db.append("places.sqlite");
+  if (db.exists()) {
+    try {
+      db.remove(false);
+    } catch (e) {
+      info("Unable to remove dummy places.sqlite");
+    }
+  }
+});