From 82e5db638808fbf67ddf987605f465d16cbc024b Mon Sep 17 00:00:00 2001
From: "Balos, Cody, J" <balos1@llnl.gov>
Date: Wed, 25 Oct 2023 12:44:52 -0700
Subject: [PATCH] uncomment GTest cmake

---
 cmake/SundialsSetupTesting.cmake        | 34 +++++++++++++------------
 test/unit_tests/sundials/CMakeLists.txt |  6 ++---
 2 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/cmake/SundialsSetupTesting.cmake b/cmake/SundialsSetupTesting.cmake
index 195aac3b4b..de51ce06a9 100644
--- a/cmake/SundialsSetupTesting.cmake
+++ b/cmake/SundialsSetupTesting.cmake
@@ -136,22 +136,24 @@ endif()
 
 # Check if unit tests are enabled
 if(SUNDIALS_TEST_UNITTESTS)
-  # message(WARNING "Could not find Google Test so we are cloning it from GitHub...")
-  # include(FetchContent)
-  # FetchContent_Declare(
-  #   googletest
-  #   URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
-  # )
-  # if(WIN32)
-  #   # For Windows: Prevent overriding the parent project's compiler/linker settings
-  #   set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-  # endif()
-  # FetchContent_GetProperties(googletest)
-  # if(NOT googletest_POPULATED)
-  #   FetchContent_Populate(googletest)
-  #   add_subdirectory(${googletest_SOURCE_DIR} ${googletest_BINARY_DIR})
-  # endif()
-  # include(GoogleTest)
+  find_package(GTest)
+  if(NOT TARGET GTest::gtest_main)
+    include(FetchContent)
+    FetchContent_Declare(
+      googletest
+      URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
+    )
+    if(WIN32)
+      # For Windows: Prevent overriding the parent project's compiler/linker settings
+      set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+    endif()
+    FetchContent_GetProperties(googletest)
+    if(NOT googletest_POPULATED)
+      FetchContent_Populate(googletest)
+      add_subdirectory(${googletest_SOURCE_DIR} ${googletest_BINARY_DIR})
+    endif()
+    include(GoogleTest)
+  endif()
 endif()
 
 # If examples are installed, create post install smoke test targets
diff --git a/test/unit_tests/sundials/CMakeLists.txt b/test/unit_tests/sundials/CMakeLists.txt
index d3fada71d8..dc9ce4c8b0 100644
--- a/test/unit_tests/sundials/CMakeLists.txt
+++ b/test/unit_tests/sundials/CMakeLists.txt
@@ -10,8 +10,8 @@
 # SUNDIALS Copyright End
 # ---------------------------------------------------------------
 
-# add_executable(test_sundials_errors test_sundials_errors.cpp)
-# target_link_libraries(test_sundials_errors PRIVATE sundials_generic GTest::gtest_main GTest::gmock)
-# gtest_discover_tests(test_sundials_errors)
+add_executable(test_sundials_errors test_sundials_errors.cpp)
+target_link_libraries(test_sundials_errors PRIVATE sundials_generic GTest::gtest_main GTest::gmock)
+gtest_discover_tests(test_sundials_errors)
 
 add_subdirectory(reductions)