From d48bfe2a64a1d0beb4b9d75a5e177ea026d390e2 Mon Sep 17 00:00:00 2001
From: Luca Heltai <luca.heltai@sissa.it>
Date: Wed, 10 Apr 2019 01:44:43 +0200
Subject: [PATCH] ParsedConvergenceTable, custom error computation.

---
 tests/base/parsed_convergence_table_07.cc     | 60 +++++++++++++++++++
 tests/base/parsed_convergence_table_07.output |  7 +++
 2 files changed, 67 insertions(+)
 create mode 100644 tests/base/parsed_convergence_table_07.cc
 create mode 100644 tests/base/parsed_convergence_table_07.output

diff --git a/tests/base/parsed_convergence_table_07.cc b/tests/base/parsed_convergence_table_07.cc
new file mode 100644
index 0000000000..81a216edf0
--- /dev/null
+++ b/tests/base/parsed_convergence_table_07.cc
@@ -0,0 +1,60 @@
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2019 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.md at
+// the top level directory of deal.II.
+//
+// ---------------------------------------------------------------------
+
+// Test the functionality of the ParsedConvergenceTable class for
+// custom error computations
+
+#include <deal.II/base/function_lib.h>
+#include <deal.II/base/parsed_convergence_table.h>
+
+#include <deal.II/dofs/dof_handler.h>
+
+#include <deal.II/fe/fe_q.h>
+#include <deal.II/fe/fe_system.h>
+
+#include <deal.II/grid/grid_generator.h>
+#include <deal.II/grid/tria.h>
+
+#include <deal.II/lac/vector.h>
+
+#include <map>
+
+#include "../tests.h"
+
+int
+main()
+{
+  initlog();
+
+  ParsedConvergenceTable table({"u"}, {{ParsedConvergenceTableFlags::custom}});
+
+  ParameterHandler prm;
+  table.add_parameters(prm);
+
+  Triangulation<2> tria;
+  GridGenerator::hyper_cube(tria);
+
+  FESystem<2>   fe(FE_Q<2>(1), 1);
+  DoFHandler<2> dh(tria);
+
+  for (unsigned int i = 0; i < 5; ++i)
+    {
+      tria.refine_global(1);
+      dh.distribute_dofs(fe);
+      auto cycle = [&](const unsigned int) { return (i + 1) * 1.0; };
+      table.custom_error(cycle, dh, "cycle", true);
+    }
+  table.output_table(deallog.get_file_stream());
+}
diff --git a/tests/base/parsed_convergence_table_07.output b/tests/base/parsed_convergence_table_07.output
new file mode 100644
index 0000000000..fe2d44fefa
--- /dev/null
+++ b/tests/base/parsed_convergence_table_07.output
@@ -0,0 +1,7 @@
+
+dofs cells     u_cycle     
+9    4     1.000e+00 -     
+25   16    2.000e+00 -1.36 
+81   64    3.000e+00 -0.69 
+289  256   4.000e+00 -0.45 
+1089 1024  5.000e+00 -0.34 
-- 
2.39.5