option(JSON_Sanitizer "Build test suite with Clang sanitizer" OFF)
option(JSON_Valgrind "Execute test suite with Valgrind" OFF)
option(JSON_NoExceptions "Build test suite without exceptions" OFF)

if(JSON_Sanitizer)
    message(STATUS "Building test suite with Clang sanitizer")
    if(NOT MSVC)
        set(CMAKE_CXX_FLAGS "-std=c++11 -g -O2 -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer")
    endif()
endif()

if(JSON_Valgrind)
    find_program(CMAKE_MEMORYCHECK_COMMAND valgrind)
    message(STATUS "Executing test suite with Valgrind (${CMAKE_MEMORYCHECK_COMMAND})")
    set(MEMORYCHECK_COMMAND_OPTIONS "--error-exitcode=1 --leak-check=full")
    set(memcheck_command "${CMAKE_MEMORYCHECK_COMMAND} ${CMAKE_MEMORYCHECK_COMMAND_OPTIONS}")
    separate_arguments(memcheck_command)
endif()

if(JSON_NoExceptions)
    message(STATUS "Building test suite without exceptions")
    if(NOT MSVC)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DJSON_NOEXCEPTION")
    endif()
    set(CATCH_TEST_FILTER -e)
endif()

#############################################################################
# Catch library with the main function to speed up build
#############################################################################

add_library(catch_main OBJECT
    "src/unit.cpp"
)
set_target_properties(catch_main PROPERTIES
    CXX_STANDARD 11
    CXX_STANDARD_REQUIRED ON
    COMPILE_DEFINITIONS "$<$<CXX_COMPILER_ID:MSVC>:_SCL_SECURE_NO_WARNINGS>"
    COMPILE_OPTIONS "$<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>"
)
target_include_directories(catch_main PRIVATE "thirdparty/catch")

#############################################################################
# one executable for each unit test file
#############################################################################

file(GLOB files "src/unit-*.cpp")
foreach(file ${files})
    get_filename_component(file_basename ${file} NAME_WE)
    string(REGEX REPLACE "unit-([^$]+)" "test-\\1" testcase ${file_basename})

    add_executable(${testcase} $<TARGET_OBJECTS:catch_main> ${file})
    set_target_properties(${testcase} PROPERTIES
        CXX_STANDARD 11
        CXX_STANDARD_REQUIRED ON
        COMPILE_DEFINITIONS "$<$<CXX_COMPILER_ID:MSVC>:_SCL_SECURE_NO_WARNINGS>"
        COMPILE_OPTIONS "$<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>"
    )

    target_compile_definitions(${testcase} PRIVATE CATCH_CONFIG_FAST_COMPILE)
    target_include_directories(${testcase} PRIVATE "thirdparty/catch")
    target_link_libraries(${testcase} ${JSON_TARGET_NAME})

    if(NOT MSVC)
        set_target_properties(${testcase} PROPERTIES COMPILE_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated -Wno-float-equal")
    endif()

    include(cotire OPTIONAL)
    if(COMMAND cotire)
        cotire(${testcase})
    endif()

    add_test(NAME "${testcase}_default"
      COMMAND ${testcase} ${CATCH_TEST_FILTER}
      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    )
    set_tests_properties("${testcase}_default" PROPERTIES LABELS "default")

    add_test(NAME "${testcase}_all"
      COMMAND ${testcase} ${CATCH_TEST_FILTER} "*"
      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    )
    set_tests_properties("${testcase}_all" PROPERTIES LABELS "all")

    if(JSON_Valgrind)
        add_test(NAME "${testcase}_valgrind"
          COMMAND ${memcheck_command} ${CMAKE_CURRENT_BINARY_DIR}/${testcase} ${CATCH_TEST_FILTER}
          WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        )
        set_tests_properties("${testcase}_valgrind" PROPERTIES LABELS "valgrind")
    endif()

endforeach()