Run cmake-init and setup flake.nix and default.nix

test/CMakeLists.txt

@@ -0,0 +1,17 @@
+# Parent project does not export its library target, so this CML implicitly
+# depends on being added from it, i.e. the testing is done only from the build
+# tree and is not feasible from an install location
+
+project(ec-controllerTests LANGUAGES CXX)
+
+# ---- Tests ----
+
+add_executable(ec-controller_test source/ec-controller_test.cpp)
+target_link_libraries(ec-controller_test PRIVATE ec-controller_lib)
+target_compile_features(ec-controller_test PRIVATE cxx_std_20)
+
+add_test(NAME ec-controller_test COMMAND ec-controller_test)
+
+# ---- End-of-file commands ----
+
+add_folders(Test)