From cbbe5c5c98158acca231ee8dd0811d9f02996149 Mon Sep 17 00:00:00 2001
From: Thomas Padioleau <thomas.padioleau@cea.fr>
Date: Tue, 28 Jul 2026 10:39:04 +0200
Subject: [PATCH] Simplify testing, rely only the default backend of Kokkos

---
 tests/CMakeLists.txt     | 19 ++++---------------
 tests/gmgpolar_tests.cpp |  5 +----
 2 files changed, 5 insertions(+), 19 deletions(-)

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index bd33facb1..9bc1585ab 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -24,19 +24,8 @@ set(gmgpolar_test_sources
 
 include(GoogleTest)
 
-# Build the test suite twice: once for serial (1 thread) and once for parallel (16 threads).
-# GMGPOLAR_TEST_THREADS is passed to Kokkos::InitializationSettings at startup.
-foreach(label_threads "Serial;1" "Parallel;16")
-    list(GET label_threads 0 label)
-    list(GET label_threads 1 num_threads)
-    set(test_target gmgpolar_tests_${label})
+add_executable(gmgpolar_tests ${gmgpolar_test_sources})
+target_compile_features(gmgpolar_tests PRIVATE cxx_std_20)
+target_link_libraries(gmgpolar_tests GMGPolarLib GMGPolarInterface GTest::gtest)
 
-    add_executable(${test_target} ${gmgpolar_test_sources})
-    target_compile_features(${test_target} PRIVATE cxx_std_20)
-    target_compile_definitions(${test_target} PRIVATE GMGPOLAR_TEST_THREADS=${num_threads})
-    target_link_libraries(${test_target} GMGPolarLib GMGPolarInterface GTest::gtest)
-
-    gtest_discover_tests(${test_target}
-        TEST_PREFIX ${label}
-        DISCOVERY_MODE PRE_TEST)
-endforeach()
+gtest_discover_tests(gmgpolar_tests DISCOVERY_MODE PRE_TEST)
diff --git a/tests/gmgpolar_tests.cpp b/tests/gmgpolar_tests.cpp
index a39101503..0c0c1b3a4 100644
--- a/tests/gmgpolar_tests.cpp
+++ b/tests/gmgpolar_tests.cpp
@@ -4,10 +4,7 @@
 // Define the main function only once
 int main(int argc, char* argv[])
 {
-    Kokkos::InitializationSettings settings;
-    // 8 (CPU) threads
-    settings.set_num_threads(GMGPOLAR_TEST_THREADS);
-    Kokkos::ScopeGuard kokkos_scope(settings);
+    Kokkos::ScopeGuard kokkos_scope(argc, argv);
     testing::InitGoogleTest(&argc, argv);
     return RUN_ALL_TESTS();
 }