--- /dev/null
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2010 - 2015 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.
+//
+// ---------------------------------------------------------------------
+
+
+#include "../tests.h"
+#include <deal.II/base/data_out_base.h>
+#include <deal.II/base/table_handler.h>
+#include <deal.II/base/convergence_table.h>
+
+#include <vector>
+#include <string>
+
+// test the method evaluate_convergence_rates with key column given by
+// unsigned long long int
+
+int main ()
+{
+ initlog();
+
+ ConvergenceTable t;
+
+ const unsigned long long int t1 = 100;
+ const unsigned long long int t2 = 400;
+ t.add_value("cells", t1);
+ t.add_value("error", 0.1);
+ t.add_value("cells", t2);
+ t.add_value("error", 0.025);
+ t.evaluate_convergence_rates("error", "cells", ConvergenceTable::reduction_rate_log2, 2);
+ t.write_text(deallog.get_file_stream());
+}