unit tests and fixes

src/file_manager/file_manager.cpp

@@ -711,6 +711,10 @@ auto file_manager::rename_file(const std::string &from_api_path,
 }
 
 void file_manager::start() {
+  polling::instance().set_callback(
+      {"timed_out_close", polling::frequency::second,
+       [this]() { this->close_timed_out_files(); }});
+
   if (provider_.is_direct_only()) {
     stop_requested_ = false;
     return;
@@ -791,9 +795,6 @@ void file_manager::start() {
 
     upload_thread_ =
         std::make_unique<std::thread>([this] { upload_handler(); });
-    polling::instance().set_callback(
-        {"timed_out_close", polling::frequency::second,
-         [this]() { this->close_timed_out_files(); }});
     event_system::instance().raise<service_started>("file_manager");
   }
 }