From 1418d5cc62f2f888aed5c033fa3fd9f50eb67235 Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Tue, 1 Jun 2021 23:49:13 +0200
Subject: Add Check framework for unit tests

---
 Makefile     | 25 ++++++++++++++++++-------
 tests/main.c | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+), 7 deletions(-)
 create mode 100644 tests/main.c

diff --git a/Makefile b/Makefile
index c642e1f..dd64148 100644
--- a/Makefile
+++ b/Makefile
@@ -4,13 +4,18 @@ LDFLAGS         = -lm
 BUILDDIR        = build
 SOURCEDIR       = src
 OBJECTDIR       = obj
+TESTDIR         = tests
 
-OUTPUT          = dns
+OUTPUT          = dnsd
 
 SRCS = $(wildcard $(SOURCEDIR)/*.c)
 OBJS = $(SRCS:.c=.o)
 OBJ  = $(OBJS:$(SOURCEDIR)/%=$(OBJECTDIR)/%)
 
+TESTS = $(wildcard $(TESTDIR)/*.c)
+TOBJS = $(TESTS:.c=.o)
+TSUBS = $(filter-out $(OBJECTDIR)/main.o,$(OBJ))
+
 build: dir $(OBJ)
 	@echo [LD] $(OBJ)
 	@$(CC) $(CFLAGS) -o $(BUILDDIR)/$(OUTPUT) $(OBJ) $(LDFLAGS)
@@ -18,9 +23,11 @@ build: dir $(OBJ)
 debug: CFLAGS += -g -D _DEBUG
 debug: build;
 
-test: CFLAGS += -D _TEST
-test: clean debug
-	$(BUILDDIR)/$(OUTPUT)
+test: LDFLAGS += -lcheck
+test: clean dir $(TOBJS) $(TSUBS)
+	@echo [LD] $(TOBJS) $(TSUBS)
+	@$(CC) $(CFLAGS) -I $(SOURCEDIR) -o $(TESTDIR)/run $(TOBJS) $(TSUBS) $(LDFLAGS)
+	@$(TESTDIR)/run
 
 dir:
 	@mkdir -p $(OBJECTDIR)
@@ -30,6 +37,10 @@ $(OBJECTDIR)/%.o: $(SOURCEDIR)/%.c
 	@echo [CC] $<
 	@$(CC) $(CFLAGS) -c $< -o $@
 
+$(TESTDIR)/%.o: $(TESTDIR)/%.c
+	@echo [TEST] $<
+	@$(CC) $(CFLAGS) -I $(SOURCEDIR) -c $< -o $@
+
 #sudo setcap 'cap_net_bind_service=+ep' /path/to/prog
 #to allow port access
 run: build
@@ -37,9 +48,9 @@ run: build
 
 .PHONY: clean
 clean:
-	@echo [RM] $(OBJ)
-	@echo [RM] $(BUILDDIR)/$(OUTPUT)
-	@rm -df  $(OBJ)
+	@echo [RM] $(OBJ) $(TOBJS)
+	@echo [RM] $(BUILDDIR)/$(OUTPUT) $(TESTDIR)/run
+	@rm -df  $(OBJ) $(TOBJS) $(TESTDIR)/run
 	@rm -Rdf $(BUILDDIR) $(OBJECTDIR)
 
 .PHONY: all
diff --git a/tests/main.c b/tests/main.c
new file mode 100644
index 0000000..65d527f
--- /dev/null
+++ b/tests/main.c
@@ -0,0 +1,33 @@
+#include <check.h>
+
+START_TEST (test_example) {
+	ck_abort();
+} END_TEST
+
+Suite* tests(void) {
+	Suite *s;
+	TCase *tc_core;
+
+	s = suite_create("DNS Tests");
+
+	tc_core = tcase_create("Core");
+
+	tcase_add_test(tc_core, test_example);
+	suite_add_tcase(s, tc_core);
+
+	return s;
+}
+
+int main() {
+	Suite *s;
+	SRunner *sr;
+
+	s = tests();
+	sr = srunner_create(s);
+
+	srunner_run_all(sr,CK_NORMAL);
+
+	srunner_free(sr);
+
+	return srunner_ntests_failed(sr);
+}
-- 
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