/*
 * This file is part of the GROMACS molecular simulation package.
 *
 * Copyright 2018- The GROMACS Authors
 * and the project initiators Erik Lindahl, Berk Hess and David van der Spoel.
 * Consult the AUTHORS/COPYING files and https://www.gromacs.org for details.
 *
 * GROMACS is free software; you can 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.
 *
 * GROMACS 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GROMACS; if not, see
 * https://www.gnu.org/licenses, or write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
 *
 * If you want to redistribute modifications to GROMACS, please
 * consider that scientific software is very special. Version
 * control is crucial - bugs must be traceable. We will be happy to
 * consider code for inclusion in the official distribution, but
 * derived work must not be called official GROMACS. Details are found
 * in the README & COPYING files - if they are missing, get the
 * official version at https://www.gromacs.org.
 *
 * To help us fund GROMACS development, we humbly ask that you cite
 * the research papers on the package. Check out https://www.gromacs.org.
 */
/*! \internal \file
 * \brief
 * Tests for general functionality in gmx::LocalAtomSetManager and
 * gmx::LocalAtomSet, which is only accesible through the manager.
 *
 * TODO: add testing for behaviour on multiple ranks once gmx_ga2la_t
 * may be set up individually and outside domain decomposition initialisation.
 *
 * \author Christian Blau <cblau@gwdg.de>
 * \ingroup module_domdec
 */
#include "gmxpre.h"

#include "gromacs/domdec/localatomsetmanager.h"

#include <gmock/gmock.h>
#include <gtest/gtest.h>

#include "gromacs/domdec/localatomset.h"
#include "gromacs/utility/arrayref.h"
#include "gromacs/utility/exceptions.h"

#include "testutils/testasserts.h"

namespace gmx
{

extern template LocalAtomSet LocalAtomSetManager::add<void, void>(ArrayRef<const int> globalAtomIndex);

namespace test
{

TEST(LocalAtomSetManager, CanAddEmptyLocalAtomSet)
{
    LocalAtomSetManager    manager;
    const std::vector<int> emptyIndex = {};
    LocalAtomSet           emptyGroup(manager.add(emptyIndex));
    const std::vector<int> globalIndexFromGroup(emptyGroup.globalIndex().begin(),
                                                emptyGroup.globalIndex().end());
    ASSERT_THAT(globalIndexFromGroup, testing::ContainerEq(emptyIndex));
}

TEST(LocalAtomSetManager, CanAddandReadLocalAtomSetIndices)
{
    LocalAtomSetManager manager;

    const std::vector<int> index = { 5, 10 };
    LocalAtomSet           newGroup(manager.add(index));
    std::vector<int>       readIndex;
    for (const auto& i : newGroup.localIndex())
    {
        readIndex.push_back(i);
    }

    ASSERT_THAT(readIndex, testing::ContainerEq(index));
}

} // namespace test
} // namespace gmx
