add catch2 test

CMakeLists.txt

@@ -5,33 +5,48 @@ project(mrubypp LANGUAGES CXX)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+option(MRUBYPP_BUILD_TEST "Build Catch2 Test" ON)
+
 if (MSVC)
     add_compile_options("$<$<C_COMPILER_ID:MSVC>:/utf-8>")
     add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/utf-8>")
     add_compile_definitions(NOMINMAX)
 endif ()
 
-add_executable(mrubypp main.cpp
+add_library(mrubypp INTERFACE
         mrubypp.h
         mrubypp_converters.h
         mrubypp_arena_guard.h
-        mrubypp_bind_class.h
-        example/Point.cpp
-        example/Point.h)
+        mrubypp_bind_class.h)
 
 
-if (NOT mruby_ROOT)
-    message(NOTICE "[mrubypp] Using default mruby build")
-    set(mruby_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/deps/mruby")
-endif ()
-
-target_include_directories(mrubypp PUBLIC "${mruby_ROOT}/include")
-target_link_directories(mrubypp PUBLIC "${mruby_ROOT}/lib")
-target_link_libraries(mrubypp PUBLIC
-        libmruby ws2_32.lib wsock32.lib ws2_32.lib)
-
 include_directories(${CMAKE_CURRENT_LIST_DIR})
 
+if (${MRUBYPP_BUILD_TEST})
+    if (NOT mruby_ROOT)
+        message(NOTICE "[mrubypp] Using default mruby build")
+        set(mruby_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/deps/mruby")
+    endif ()
+
+
+    add_subdirectory(deps/Catch2)
+
+    enable_testing()
+
+    add_executable(mrubypp_test
+            test/test_class.cpp
+            test/test_engine.cpp)
+
+
+    target_include_directories(mrubypp_test PUBLIC "${mruby_ROOT}/include")
+    target_link_directories(mrubypp_test PUBLIC "${mruby_ROOT}/lib")
+    target_link_libraries(mrubypp_test PUBLIC
+            libmruby ws2_32.lib wsock32.lib ws2_32.lib)
+
+    target_link_libraries(mrubypp_test PRIVATE mrubypp Catch2::Catch2WithMain)
+    add_test(NAME mrubypp_test COMMAND mrubypp_test)
+endif ()
+
 include(GNUInstallDirs)
 install(TARGETS mrubypp
         LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}