feat: Add testing setup

Makefile

@@ -30,8 +30,10 @@ obj/%.o: src/%.c obj
 macrofuck: $(OBJS)
 	$(LD) $(LDFLAGS) -o $@ $^
 
-test:
-	@echo "Not yet implemented"
+test: macrofuck FORCE
+	./test/tests.sh "./macrofuck"
+
+FORCE: ;
 
 clean:
 	@echo "Cleaning up"

test/cases/001-print-char.in

@@ -0,0 +1,2 @@
+print 'A';
+

test/tests.sh

@@ -0,0 +1,40 @@
+#/bin/sh
+
+executable="$1"
+
+tmpfile="/tmp/$$.tmp"
+resultsfile="/tmp/$$.results"
+touch "$resultsfile"
+
+run_testcase() {
+	test="$1"
+	echo "Test: $test"
+
+	if "$executable" -o "$tmpfile" "$test.in"; then
+		if diff -q "$test.out" "$tmpfile" > /dev/null; then
+			printf "  \033[32msuccess\033[0m\n"
+			echo "$test: success" >> "$resultsfile"
+		else
+			printf "  \033[31mfailed with diff\033[0m\n"
+			echo "$test: fail" >> "$resultsfile"
+		fi
+	else
+		printf "  \033[31mfailed with error\033[0m\n"
+		echo "$test: fail" >> "$resultsfile"
+	fi
+
+	rm "$tmpfile";
+}
+
+ls cases/*.in test/cases/*.in | sed -E 's/.in$//g' |  while read test; do
+	run_testcase "$test"
+done
+
+echo
+echo
+echo "$(cat "$resultsfile" | wc -l) tests in total"
+echo "$(grep ": fail" "$resultsfile" | wc -l) tests failed"
+echo "$(grep ": success" "$resultsfile" | wc -l) tests succeeded" 
+echo
+
+rm "$resultsfile"