--- /dev/null
+// ---------------------------------------------------------------------
+// $Id$
+//
+// Copyright (C) 2009 - 2014 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// The deal.II library is free software; you can use it, redistribute
+// it, and/or modify it under the terms of the GNU Lesser General
+// Public License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// The full text of the license can be found in the file LICENSE at
+// the top level of the deal.II distribution.
+//
+// ---------------------------------------------------------------------
+
+
+// verify Threads::Task::joinable()
+
+#include "../tests.h"
+#include <iomanip>
+#include <fstream>
+#include <unistd.h>
+
+#include <deal.II/base/thread_management.h>
+
+
+void test ()
+{
+ sleep (3);
+ deallog << "OK" << std::endl;
+}
+
+
+int main()
+{
+ std::ofstream logfile("output");
+ deallog.attach(logfile);
+ deallog.depth_console(0);
+ deallog.threshold_double(1.e-10);
+
+ Threads::Task<> t;
+ Assert (t.joinable() == false, ExcInternalError());
+
+ t = Threads::new_task (test);
+ Assert (t.joinable() == true, ExcInternalError());
+ t.join ();
+}