Add Makefile & tests

Makefile

@@ -0,0 +1,57 @@
+SHELL := /bin/bash
+.DEFAULT_GOAL := help
+.PHONY: coverage setup help build test
+
+setup: ## Install dependencies for tests and coverage
+	@if [ "$(shell uname)" = "Darwin" ]; then \
+		brew install gcovr; \
+		brew install lcov; \
+	fi
+	@if [ "$(shell uname)" = "Linux" ]; then \
+		pip install gcovr; \
+	fi
+
+dependency: ## Create a dependency graph diagram of the project (build/dependency.png)
+	cd build && cmake .. --graphviz=dependency.dot && dot -Tpng dependency.dot -o dependency.png
+
+build: ## Build the project
+	@echo ">>> Building BayesNet ...";
+	@if [ -d ./build ]; then rm -rf ./build; fi
+	@mkdir build; 
+	cmake -S . -B build; \
+	cd build; \
+	make; \
+	
+	@echo ">>> Done";
+
+test: ## Run tests
+	@echo "* Running tests...";
+	find . -name "*.gcda" -print0 | xargs -0 rm
+	@cd build; \
+	cmake --build . --target unit_tests ;
+	@cd build/tests; \
+	./unit_tests;
+
+coverage: ## Run tests and generate coverage report (build/index.html)
+	@echo "*Building tests...";
+	find . -name "*.gcda" -print0 | xargs -0 rm
+	@cd build; \
+	cmake --build . --target unit_tests ;
+	gcovr ;
+
+help: ## Show help message
+	@IFS=$$'\n' ; \
+	help_lines=(`fgrep -h "##" $(MAKEFILE_LIST) | fgrep -v fgrep | sed -e 's/\\$$//' | sed -e 's/##/:/'`); \
+	printf "%s\n\n" "Usage: make [task]"; \
+	printf "%-20s %s\n" "task" "help" ; \
+	printf "%-20s %s\n" "------" "----" ; \
+	for help_line in $${help_lines[@]}; do \
+		IFS=$$':' ; \
+		help_split=($$help_line) ; \
+		help_command=`echo $${help_split[0]} | sed -e 's/^ *//' -e 's/ *$$//'` ; \
+		help_info=`echo $${help_split[2]} | sed -e 's/^ *//' -e 's/ *$$//'` ; \
+		printf '\033[36m'; \
+		printf "%-20s %s" $$help_command ; \
+		printf '\033[0m'; \
+		printf "%s\n" $$help_info; \
+	done