feature(testing-automation): unit tests with Google Framework (#3273)

src/test/CMakeLists.txt

@@ -0,0 +1,23 @@
+CollectSourceFiles(
+        ${CMAKE_CURRENT_SOURCE_DIR}
+        PRIVATE_SOURCES
+)
+
+add_executable(
+        unit_tests
+        ${PRIVATE_SOURCES}
+)
+
+target_link_libraries(
+        unit_tests
+        gtest_main
+        game
+        game-interface
+)
+
+add_test(
+        NAME
+        unit
+        COMMAND
+        ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/unit_tests
+)