cmake_minimum_required(VERSION 3.10)

if(${CMAKE_VERSION} VERSION_LESS 3.10)
    cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
endif()

# project information
project(unit_tests
        VERSION 0.1
	      DESCRIPTION "Unit tests for C project"
        LANGUAGES C)


# guard against bad build-type strings
if (NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE "Debug")
endif()

include(CTest)
ENABLE_TESTING()

# specify C standard
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED True)
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -Wall -pedantic -g -O0 --coverage")

set(GCC_COVERAGE_LINK_FLAGS "--coverage -lgcov")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${GCC_COVERAGE_LINK_FLAGS}")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${GCC_COVERAGE_LINK_FLAGS}")

# guard against in-source builds
if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
  message(FATAL_ERROR "In-source builds not allowed. Please make a new directory (called a build directory) and run CMake from there. You may need to remove CMakeCache.txt. ")
endif()

# Fetch cmocka
find_package(cmocka QUIET)
include(FetchContent)
FetchContent_Declare(
    cmocka
    GIT_REPOSITORY https://git.cryptomilk.org/projects/cmocka.git
    GIT_TAG        cmocka-1.1.5
    GIT_SHALLOW    1
)
set(WITH_STATIC_LIB ON CACHE BOOL "CMocka: Build with a static library" FORCE)
set(WITH_CMOCKERY_SUPPORT OFF CACHE BOOL "CMocka: Install a cmockery header" FORCE)
set(WITH_EXAMPLES OFF CACHE BOOL "CMocka: Build examples" FORCE)
set(UNIT_TESTING OFF CACHE BOOL "CMocka: Build with unit testing" FORCE)
set(PICKY_DEVELOPER OFF CACHE BOOL "CMocka: Build with picky developer flags" FORCE)
FetchContent_MakeAvailable(cmocka)

add_compile_definitions(TEST DEBUG=0 SKIP_FOR_CMOCKA)

include_directories(../../src/)

# add cmocka tests
add_executable(test_demo tests/demo.c)

# add src
add_library(demo SHARED ./demo_tu.c)

target_link_libraries(test_demo PUBLIC cmocka gcov demo)

add_test(test_demo test_demo)