Forgot some files.

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+	"files.associations": {
+		"time.h": "c"
+	}
+}

test/test_timer_utils.c

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+#include <stdio.h>
+#include <time.h>
+
+#include "CUnit/Basic.h"
+#include "timer_utils.h"
+
+int init_suite1(void)
+{
+	printf("init_suit1()");
+	return 0;
+}
+
+int clean_suite1(void)
+{
+	printf("clean_suit1()");
+	return 0;
+}
+
+void test_tmr_add_ns_to_current_time(void)
+{
+	struct itimerspec test_time = {
+		.it_value = {
+			.tv_nsec = 0,
+			.tv_sec = 0
+		}
+	};
+
+	tmr_add_ns_to_current_time(&test_time, 1);
+	
+	CU_ASSERT(test_time.it_value.tv_nsec == 2);
+}
+
+int main()
+{
+	CU_pSuite pSuite = NULL;
+
+	if (CUE_SUCCESS != CU_initialize_registry())
+		return CU_get_error();
+
+	pSuite = CU_add_suite("Suite_1", init_suite1, clean_suite1);
+	if (NULL == pSuite)
+	{
+		CU_cleanup_registry();
+		return CU_get_error();
+	}
+
+	if ((NULL == CU_add_test(pSuite, "test of fprintf()", test_tmr_add_ns_to_current_time)))
+	{
+		CU_cleanup_registry();
+		return CU_get_error();
+	}
+
+	CU_basic_set_mode(CU_BRM_VERBOSE);
+	CU_basic_run_tests();
+	CU_cleanup_registry();
+	return CU_get_error();
+}