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// Copyright (C) 2021 Chris Richardson
//
// This file is part of DOLFINx (https://www.fenicsproject.org)
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//
// Unit tests for Distributed la::Vector
#include <algorithm>
#include <catch2/catch_template_test_macros.hpp>
#include <catch2/catch_test_macros.hpp>
#include <complex>
#include <dolfinx/common/IndexMap.h>
#include <dolfinx/common/MPI.h>
#include <dolfinx/la/Vector.h>
using namespace dolfinx;
namespace
{
template <typename T>
void test_vector()
{
const int mpi_size = dolfinx::MPI::size(MPI_COMM_WORLD);
const int mpi_rank = dolfinx::MPI::rank(MPI_COMM_WORLD);
constexpr int size_local = 100;
// Create some ghost entries on next process
int num_ghosts = (mpi_size - 1) * 3;
std::vector<std::int64_t> ghosts(num_ghosts);
for (int i = 0; i < num_ghosts; ++i)
ghosts[i] = (mpi_rank + 1) % mpi_size * size_local + i;
const std::vector<int> global_ghost_owner(ghosts.size(),
(mpi_rank + 1) % mpi_size);
// Create an IndexMap
auto index_map = std::make_shared<common::IndexMap>(
MPI_COMM_WORLD, size_local, ghosts, global_ghost_owner);
la::Vector<T> v(index_map, 1);
std::ranges::fill(v.mutable_array(), 1.0);
double norm2 = la::squared_norm(v);
CHECK(norm2 == mpi_size * size_local);
std::ranges::fill(v.mutable_array(), mpi_rank);
double sumn2
= size_local * (mpi_size - 1) * mpi_size * (2 * mpi_size - 1) / 6;
CHECK(la::squared_norm(v) == sumn2);
CHECK(la::norm(v, la::Norm::l2) == std::sqrt(sumn2));
CHECK(la::inner_product(v, v) == sumn2);
CHECK(la::norm(v, la::Norm::linf) == static_cast<T>(mpi_size - 1));
}
} // namespace
TEMPLATE_TEST_CASE("Linear Algebra Vector", "[la_vector]", double,
std::complex<double>)
{
CHECK_NOTHROW(test_vector<TestType>());
}
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