From: Markus Blatt <markus@dr-blatt.de>
Date: Fri, 13 Jan 2023 18:12:31 +0100
Subject: [python] Run unit tests directly and not via setup.py (deprecated).

Thus we get rid of the warning:

WARNING: Testing via this command is deprecated and will be removed in
a future version. Users looking for a generic test entry point
independent of test runner are encouraged to use tox.
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9039dc2..d057ece 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -477,7 +477,7 @@ if (OPM_ENABLE_PYTHON)
   # testing.
   add_test(NAME python_tests
            WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/python
-           COMMAND ${CMAKE_COMMAND} -E env LD_LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib ${Python3_EXECUTABLE} setup.py build_ext --dry-run --build-lib ${PROJECT_BINARY_DIR}/python test
+           COMMAND ${CMAKE_COMMAND} -E env LD_LIBRARY_PATH=${PROJECT_BINARY_DIR}/lib ${Python3_EXECUTABLE} -m unittest discover
            )
 
   set_target_properties(opmcommon PROPERTIES POSITION_INDEPENDENT_CODE ON)