Adds unit tests

src/CMakeLists.txt

@@ -1,10 +1,20 @@
 
+set(assignment_HEADERS
+  calc.hpp
+  json_output.hpp
+  proto_loader.hpp
+  spatial_grid.hpp)
+
 set(assignment_SOURCES
-  main.cpp
   calc.cpp
   json_output.cpp
   proto_loader.cpp)
 
-add_executable(main ${assignment_SOURCES})
-target_link_libraries(main PRIVATE proto ${PROTOBUF_LIBRARY})
-target_link_libraries(main PRIVATE nlohmann_json::nlohmann_json)
+add_library(assignment ${assignment_SOURCES} ${assignment_HEADERS})
+set_target_properties(assignment PROPERTIES PUBLIC_HEADER "${assignment_HEADERS}")
+target_link_libraries(assignment PRIVATE proto ${PROTOBUF_LIBRARY} )
+target_link_libraries(assignment PUBLIC nlohmann_json::nlohmann_json)
+
+add_executable(main main.cpp)
+target_link_libraries(main assignment)
+