add testing code

test/src/main.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "test.h"
+
+int main(void) {
+	/*
+	// tests that should be performed
+	testdat tests[] = {
+	};
+
+	// get test count
+	size_t n = sizeof(tests) / sizeof(tests[0]);
+	*/
+
+	return exec_tests(NULL, 0);
+	// return exec_tests(tests, n);
+}