adding repetitive DigIo mock test

test/test.c

@@ -3,6 +3,7 @@
 #include "../libopeninv/include/params.h"
 #include "test.h"
 #include "test_can.h"
+#include "test_io.h"
 #include "test_state.h"
 
 extern void Param::Change(Param::PARAM_NUM ParamNum){ };
@@ -16,6 +17,7 @@ int main() {
    TestCase tests[] = {
       (TestCase){"test_is_evse_input", test_is_evse_input},
       (TestCase){"test_check_unplugged", test_check_unplugged},
+      (TestCase){"test_disable_all", test_disable_all},
       // Example:
       //(TestCase){"Your tests name", function_name_without_brackets}
       //...