Adding unit tests.

lib/CMakeLists.txt

@@ -45,7 +45,11 @@ if(DAWN_TARGET_OPENAL)
   add_subdirectory(AudioFile)
 endif()
 
-# Test
+# Catch2 Testing Framework
+set(catch2_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/Catch2 CACHE INTERNAL ${DAWN_CACHE_TARGET})
+add_subdirectory(Catch2)
+
+# Emscripten (TESTING ONLY)
 if(DEFINED DAWN_EMSCRIPTEN_FLAGS)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${DAWN_EMSCRIPTEN_FLAGS}" CACHE INTERNAL ${DAWN_CACHE_TARGET})
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${DAWN_EMSCRIPTEN_FLAGS}" CACHE INTERNAL ${DAWN_CACHE_TARGET})