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mfem/tests/unit/mesh/test_mfem_mesh_reader.cpp
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// Copyright (c) 2010-2025, Lawrence Livermore National Security, LLC. Produced
// at the Lawrence Livermore National Laboratory. All Rights reserved. See files
// LICENSE and NOTICE for details. LLNL-CODE-806117.
//
// This file is part of the MFEM library. For more information and source code
// availability visit https://mfem.org.
//
// MFEM is free software; you can redistribute it and/or modify it under the
// terms of the BSD-3 license. We welcome feedback and contributions, see file
// CONTRIBUTING.md for details.
#include "mfem.hpp"
#include "unit_tests.hpp"
#include <algorithm>
#include <string>
#include <utility>
#include <vector>
using namespace mfem;
TEST_CASE("MFEM Mesh Named Attributes", "[Mesh]")
{
// Path relative to the directory tests/unit
Mesh mesh("data/compass-testing.mesh");
REQUIRE(mesh.Dimension() == 2);
REQUIRE(mesh.GetNE() == 12);
REQUIRE(mesh.GetNV() == 13);
REQUIRE(mesh.attribute_sets.attr_sets.Size() == 16);
REQUIRE(mesh.bdr_attribute_sets.attr_sets.Size() == 13);
std::vector<std::pair<std::string, std::vector<int>>> expected_attr_sets =
{
{"Base", {9}},
{"E Even", {16}},
{"E Odd", {17}},
{"East", {16, 17}},
{"N Even", {10}},
{"N Odd", {11}},
{"North", {10, 11}},
{"Rose", {10, 11, 12, 13, 14, 15, 16, 17}},
{"Rose Even", {10, 12, 14, 16}},
{"Rose Odd", {11, 13, 15, 17}},
{"S Even", {14}},
{"S Odd", {15}},
{"South", {14, 15}},
{"W Even", {12}},
{"W Odd", {13}},
{"West", {12, 13}}
};
for (auto const &attr_name_index_pair: expected_attr_sets )
{
REQUIRE(mesh.attribute_sets.AttributeSetExists(
attr_name_index_pair.first));
auto const &attr_set = mesh.attribute_sets.GetAttributeSet(
attr_name_index_pair.first);
auto const &expected_attr_set = attr_name_index_pair.second;
REQUIRE(static_cast<std::size_t>(attr_set.Size()) ==
expected_attr_set.size());
bool const elements_equal = std::equal(attr_set.begin(), attr_set.end(),
expected_attr_set.begin());
REQUIRE(elements_equal);
}
std::vector<std::pair<std::string, std::vector<int>>> expected_bdr_attr_sets
=
{
{"Boundary", {1, 2, 3, 4, 5, 6, 7, 8}},
{"ENE", { 1}},
{"ESE", { 8}},
{"Eastern Boundary", {1, 8}},
{"NNE", { 2}},
{"NNW", { 3}},
{"Northern Boundary", {2, 3}},
{"SSE", { 7}},
{"SSW", { 6}},
{"Southern Boundary", {6,7}},
{"WNW", { 4}},
{"WSW", { 5}},
{"Western Boundary", {4,5}}
};
for (auto const &attr_bdr_name_index_pair: expected_bdr_attr_sets )
{
REQUIRE(mesh.bdr_attribute_sets.AttributeSetExists(
attr_bdr_name_index_pair.first));
auto const &bdr_attr_set = mesh.bdr_attribute_sets.GetAttributeSet(
attr_bdr_name_index_pair.first);
auto const &expected_bdr_attr_set = attr_bdr_name_index_pair.second;
REQUIRE(static_cast<std::size_t>(bdr_attr_set.Size()) ==
expected_bdr_attr_set.size());
bool const elements_equal = std::equal(bdr_attr_set.begin(),
bdr_attr_set.end(),
expected_bdr_attr_set.begin());
REQUIRE(elements_equal);
}
}