Add tests for generated-cpp-source & json serdes

CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.20)
+project(cppbessot LANGUAGES C CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+if(NOT DEFINED DB_SCHEMA_DIR_TO_GENERATE OR "${DB_SCHEMA_DIR_TO_GENERATE}" STREQUAL "")
+  message(FATAL_ERROR
+    "Set DB_SCHEMA_DIR_TO_GENERATE to the exact schema directory basename to test, for example -DDB_SCHEMA_DIR_TO_GENERATE=v1.2.")
+endif()
+
+include("${CMAKE_CURRENT_SOURCE_DIR}/cmake/CppBeSSOT.cmake")
+
+include(CTest)
+
+if(BUILD_TESTING)
+  add_subdirectory(tests EXCLUDE_FROM_ALL)
+endif()