--- /dev/null
+// ---------------------------------------------------------------------
+//
+// Copyright (C) 2014 - 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.
+//
+// ---------------------------------------------------------------------
+// The test checks that project_boundary_values_curl_conforming
+// works for FESystems with FE_Nedelec of different order.
+
+#include <deal.II/grid/grid_generator.h>
+#include <deal.II/fe/fe_system.h>
+#include <deal.II/fe/fe_q.h>
+#include <deal.II/fe/fe_nedelec.h>
+#include <deal.II/fe/mapping_q.h>
+#include <deal.II/lac/constraint_matrix.h>
+#include <deal.II/dofs/dof_handler.h>
+#include <deal.II/numerics/vector_tools.h>
+
+#include "../tests.h"
+
+using namespace dealii;
+
+int main(int argc, char **argv) {
+ initlog();
+ const unsigned int dim=3;
+
+ Triangulation<dim> triangulation;
+ GridGenerator::hyper_cube(triangulation, 0, 1, true);
+ MappingQ<dim> mapping(1);
+ ConstraintMatrix constraints;
+
+ //Testing cases with only Nedelec Elements in FE_System
+ {
+ deallog << "Equal order Nedelec degree 0 \t";
+ //Equal-order elements
+ FESystem<dim> fe_system(FE_Nedelec<dim>(0), 1, FE_Nedelec<dim>(0), 1);
+ DoFHandler<dim> dof_handler(triangulation);
+ dof_handler.distribute_dofs(fe_system);
+
+ constraints.clear();
+ VectorTools::project_boundary_values_curl_conforming_l2(dof_handler, dim,
+ Functions::ZeroFunction<dim>(dim + dim), 0, constraints, mapping);
+ constraints.close();
+ deallog << "OK" << std::endl;
+ }
+
+ {
+ deallog << "Mixed order Nedelec (degree 1,degree 0) \t";
+ //Elements of mixed order
+ FESystem<dim> fe_system(FE_Nedelec<dim>(1), 1, FE_Nedelec<dim>(0), 1);
+ DoFHandler<dim> dof_handler(triangulation);
+ dof_handler.distribute_dofs(fe_system);
+
+ constraints.clear();
+ VectorTools::project_boundary_values_curl_conforming_l2(dof_handler, dim,
+ Functions::ZeroFunction<dim>(dim + dim), 0, constraints, mapping);
+ constraints.close();
+ deallog << "OK" << std::endl;
+ }
+
+ return 0;
+}