Build: add google test framework

Refs: #17

CMakeLists.txt

@@ -11,3 +11,20 @@ add_library (generators src/generators.cpp)
 add_executable(wtpp src/wtpp.cpp)
 
 target_link_libraries(wtpp wave wavetable common generators)
+
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  URL https://github.com/google/googletest/archive/95d8c7ac4389b38b197bc7521dffb62508653eb5.zip
+)
+
+FetchContent_MakeAvailable(googletest)
+
+enable_testing()
+
+add_executable(wtpp_test tests/wtpp_test.cpp)
+
+target_link_libraries(wtpp_test GTest::gtest_main)
+
+include(GoogleTest)
+gtest_discover_tests(wtpp_test)

Makefile

@@ -1,13 +1,15 @@
 PROJ = wtpp
 CC = /usr/bin/clang++
-CMAKE = /usr/bin/cmake
 GDB = /usr/bin/gdb
 
-build:
-	$(CMAKE) --build build
+build-release:
+	cmake --build build
 
 clean:
-	rm wtpp
+	rm build/wtpp
+
+test: build
+	cd build && ctest
 
 debug:
 	$(CC) -g $(CFLAGS) $(OBJECTS)