Add unit test template combination

Author: greole

CMakeLists.txt

@@ -139,6 +139,7 @@ ginkgo_find_package(Ginkgo "Ginkgo::ginkgo" FALSE 1.8.0)
 include(cmake/ginkgo.cmake)
 
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -O0 -ggdb")
+
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} \
   -Wall -Wpedantic -Wextra -march=native -fopenmp -Wno-undefined-var-template")
 
@@ -164,6 +165,7 @@ elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
   set(CMAKE_CXX_FLAGS_DEBUG
       "${CMAKE_CXX_FLAGS_DEBUG} \
       --coverage\
+      --fopenmp \
       -fprofile-arcs \
       -ggdb3 \
       ")

unitTests/Combination.C

@@ -0,0 +1,18 @@
+// SPDX-FileCopyrightText: 2024 OGL authors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+
+#include "fvCFD.H"
+#include "MatrixWrapper/Combination/Combination.H"
+#include <gtest/gtest.h>
+
+
+TEST(Combination, CanCreateCombination)
+{
+    auto cmb = Combination<double, int, gko::matrix::Coo>::create(this->exec);
+
+    ASSERT_EQ(cmb->get_size(), gko::dim<2>(0, 0));
+    ASSERT_EQ(cmb->get_coefficients().size(), 0);
+    ASSERT_EQ(cmb->get_operators().size(), 0);
+}