reorganize test folder

Author: thinks

CMakeLists.txt

@@ -17,6 +17,7 @@ string(TOLOWER "${CMAKE_SOURCE_DIR}" source_dir_lower)
 if(current_source_dir_lower STREQUAL source_dir_lower)
     message(STATUS "obj-io: enable testing")
     enable_testing()
+    add_subdirectory(external/Catch2)
     add_subdirectory(test)
     add_subdirectory(examples)
 endif()

examples/CMakeLists.txt

@@ -5,8 +5,7 @@
 set(examples
     index_group_example.cc
     polygon_example.cc
-    simple_example.cc
-)
+    simple_example.cc)
 
 add_executable(thinks_obj_io_examples
     main.cc

test/CMakeLists.txt

@@ -5,14 +5,16 @@
 set(tests
     write_test.cc
     read_test.cc
-    round_trip_test.cc
-)
+    round_trip_test.cc)
 
 add_executable(thinks_obj_io_test
-    main.cc
+    catch_main.cc
     ${tests})
 target_include_directories(thinks_obj_io_test SYSTEM PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
-target_link_libraries(thinks_obj_io_test PRIVATE thinks_obj_io)
+target_link_libraries(thinks_obj_io_test 
+    PRIVATE 
+        thinks_obj_io
+        Catch2::Catch2)
 set_target_properties(thinks_obj_io_test PROPERTIES CXX_STANDARD 11)
 
 add_test(NAME test COMMAND thinks_obj_io_test)