Add tests directory for building tests if BUILD_TESTING is enabled

CMakeLists.txt

@@ -10,6 +10,10 @@ add_library(RiDDLe src/scope.cpp src/env.cpp src/core.cpp src/type.cpp src/const
 target_link_libraries(RiDDLe PUBLIC utils)
 target_include_directories(RiDDLe PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>)
 
+if(BUILD_TESTING)
+    add_subdirectory(tests)
+endif()
+
 set(CPACK_PROJECT_NAME ${PROJECT_NAME})
 set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
 include(CPack)

tests/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_executable(riddle_lib_tests test_riddle.cpp)
+target_link_libraries(riddle_lib_tests PRIVATE RiDDLe)
+
+add_test(NAME RIDDLE_LibTest COMMAND riddle_lib_tests WORKING_DIRECTORY ${CMAKE_BINARY_DIR})

tests/test_riddle.cpp

@@ -0,0 +1,6 @@
+#include <cassert>
+
+int main(int argc, char const *argv[])
+{
+    return 0;
+}