cmake_minimum_required(VERSION 3.16)
project(dolfinx-tests)

project(${PROJECT_NAME} LANGUAGES C CXX)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

# Find DOLFINx config file
find_package(DOLFINX REQUIRED)

add_custom_command(
  OUTPUT poisson.c
  COMMAND ffcx ${CMAKE_CURRENT_SOURCE_DIR}/poisson.py -o ${CMAKE_CURRENT_SOURCE_DIR}
  VERBATIM DEPENDS poisson.py COMMENT "Compile poisson.py using FFCx")

# Make test executable
set(TEST_SOURCES
  ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/poisson.c
  ${CMAKE_CURRENT_SOURCE_DIR}/vector.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/matrix.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/io.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/common/sub_systems_manager.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/common/index_map.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/common/sort.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/mesh/distributed_mesh.cpp
  ${CMAKE_CURRENT_SOURCE_DIR}/common/CIFailure.cpp
  )

find_package(Catch2 2)
if (NOT Catch2_FOUND)
  message(STATUS "Catch2 not found. Downloading.")
  Include(FetchContent)
  FetchContent_Declare(
    Catch2
    GIT_REPOSITORY https://github.com/catchorg/Catch2.git
    GIT_TAG        v2.13.8
  )
  FetchContent_MakeAvailable(Catch2)
endif()

add_executable(unittests ${TEST_SOURCES})
target_link_libraries(unittests PRIVATE Catch2::Catch2 dolfinx)
target_compile_options(unittests PRIVATE $<$<COMPILE_LANGUAGE:CXX>:-Wall -Werror -Wextra -pedantic>)

# Enable testing
enable_testing()

# Test target
add_test(unittests unittests)
