fix(tests): also run tests if test program did not change

tests/Makefile

@@ -9,6 +9,7 @@ ifeq ($(CFLAGS),)
 	CFLAGS = -Wall -Wextra -Werror -g
 endif
 tests = $(addprefix test_,$(rawtests))
+run_tests = $(addprefix run_test_,$(rawtests))
 test_objs = $(addsuffix .o,$(tests))
 objs := $(addprefix ../,$(objs)) testutil.o
 all_objs = $(objs) $(test_objs)
@@ -21,10 +22,10 @@ LIBFT = $(LIBFTDIR)libft.a
 IFLAGS = -I$(LIBFTDIR)
 LINCLUDE = -L$(LIBFTDIR)
 
-.PHONY: run
+.PHONY: run fclean run_test_%
 
 .NOTPARALLEL: run
-run: $(tests)
+run: $(run_tests)
 	@echo "Finished running C tests"
 
 -include $(deps)
@@ -35,10 +36,12 @@ run: $(tests)
 
 test_%: %.o $(objs)
 	$(CC) $(CFLAGS) -o $@ $*.o $(objs) $(LINCLUDE) $(LDLIBS)
+
+run_test_%: test_%
 	@echo
-	@echo "====== Now running test: $@ ======"
+	@echo "====== Now running test: $* ======"
 	@echo
-	./$@
+	./test_$*
 
 fclean:
 	rm -f $(tests)