Implement GTest and change windows output path

Implement GTest as a testing infrastructure.
Make windows output binaries to the build folder instead of the release type folder (potentially issue further down the line)
Add a simple unit test for DestroyableComponent

tests/CMakeLists.txt

@@ -1,34 +1,21 @@
-# create the testing file and list of tests
-create_test_sourcelist (Tests
-	CommonCxxTests.cpp
-	AMFDeserializeTests.cpp
-	TestNiPoint3.cpp
-	TestLDFFormat.cpp
-	TestEncoding.cpp
+message (STATUS "Testing is enabled.  Fetching gtest...")
+enable_testing()
+
+include(FetchContent)
+FetchContent_Declare(
+	googletest
+	GIT_REPOSITORY https://github.com/google/googletest.git
+	GIT_TAG release-1.12.1
 )
 
-# add the executable
-add_executable (CommonCxxTests ${Tests})
-target_link_libraries(CommonCxxTests ${COMMON_LIBRARIES})
+# For Windows: Prevent overriding the parent project's compiler/linker settings
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 
-# remove the test driver source file
-set (TestsToRun ${Tests})
-remove (TestsToRun CommonCxxTests.cpp)
+FetchContent_MakeAvailable(GoogleTest)
+include(GoogleTest)
 
-# Copy test files to testing directory
-configure_file(
-	${CMAKE_SOURCE_DIR}/tests/TestBitStreams/AMFBitStreamTest.bin ${PROJECT_BINARY_DIR}/tests/AMFBitStreamTest.bin
-	COPYONLY
-)
+message(STATUS "gtest fetched and is now ready.")
 
-configure_file(
-	${CMAKE_SOURCE_DIR}/tests/TestBitStreams/AMFBitStreamUnimplementedTest.bin ${PROJECT_BINARY_DIR}/tests/AMFBitStreamUnimplementedTest.bin
-	COPYONLY
-)
-
-# Add all the ADD_TEST for each test
-foreach (test ${TestsToRun})
-	get_filename_component (TName ${test} NAME_WE)
-	add_test (NAME ${TName} COMMAND CommonCxxTests ${TName})
-	set_property(TEST ${TName} PROPERTY ENVIRONMENT CTEST_OUTPUT_ON_FAILURE=1)
-endforeach ()
+# Add the subdirectories
+add_subdirectory(dCommonTests)
+add_subdirectory(dGameTests)