[hw-2] add tests, coverage, benchmarks

make/generate.mk

@@ -0,0 +1,25 @@
+
+
+define generate
+	@if [ -f "$(1)/go.mod" ]; then \
+		echo "===== running go generate for $(1) ====="; \
+		if [ ! -d "$(1)/internal" ]; then \
+			echo "no internal package in $(1)"; \
+			exit 0; \
+		fi; \
+		go generate ./$(1)/internal/...; \
+	fi
+endef
+
+
+cart-generate:
+	$(call generate,cart)
+
+loms-generate:
+	$(call generate,loms)
+
+notifier-generate:
+	$(call generate,notifier)
+
+comments-generate:
+	$(call generate,comments)