added: parallel support to HDF5File / HDF5Serializer

tests/test_HDF5File_Parallel.cpp

@@ -0,0 +1,79 @@
+/*
+  Copyright 2021 Equinor.
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  OPM is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#include <opm/common/utility/FileSystem.hpp>
+
+#include <opm/simulators/utils/HDF5File.hpp>
+#include <opm/simulators/utils/ParallelCommunication.hpp>
+
+#define BOOST_TEST_MODULE HDF5FileParallelTest
+#define BOOST_TEST_NO_MAIN
+#include <boost/test/unit_test.hpp>
+
+#include <filesystem>
+#include <numeric>
+#include <stdexcept>
+#include <string>
+
+using namespace Opm;
+
+BOOST_AUTO_TEST_CASE(ReadWrite)
+{
+    std::string path;
+    Parallel::Communication comm;
+    if (comm.rank() == 0) {
+        path = std::filesystem::temp_directory_path() / Opm::unique_path("hdf5test%%%%%");
+    }
+    std::size_t size = path.size();
+    comm.broadcast(&size, 1, 0);
+    if (comm.rank() != 0) {
+        path.resize(size);
+    }
+    comm.broadcast(path.data(), size, 0);
+    std::filesystem::create_directory(path);
+    auto rwpath = (std::filesystem::path(path) / "rw.hdf5").string();
+    std::vector<char> test_data(10);
+    std::iota(test_data.begin(), test_data.end(), 10*comm.rank());
+    {
+        Opm::HDF5File out_file(rwpath, Opm::HDF5File::OpenMode::OVERWRITE, comm);
+        BOOST_CHECK_NO_THROW(out_file.write("/test_data", "d1", test_data));
+    }
+    {
+        Opm::HDF5File in_file(rwpath, Opm::HDF5File::OpenMode::READ, comm);
+        std::vector<char> data;
+        BOOST_CHECK_NO_THROW(in_file.read("/test_data", "d1", data));
+        BOOST_CHECK_EQUAL_COLLECTIONS(data.begin(), data.end(),
+                                      test_data.begin(), test_data.end());
+    }
+    std::filesystem::remove(rwpath);
+    std::filesystem::remove(path);
+}
+
+bool init_unit_test_func()
+{
+    return true;
+}
+
+int main(int argc, char** argv)
+{
+    Dune::MPIHelper::instance(argc, argv);
+    return boost::unit_test::unit_test_main(&init_unit_test_func, argc, argv);
+}