tests: added utils.cpp to avoid gcc warnings

tests/includes.h

@@ -8,16 +8,8 @@
 #include <exception>
 
 #include "catch.hpp"
+#include "utils.h"
+
 #include "../include/spdlog/spdlog.h"
 #include "../include/spdlog/sinks/null_sink.h"
 
-
-static void prepare_logdir()
-{
-    spdlog::drop_all();
-#ifdef _WIN32
-    auto rv = system("del /F /Q logs\\*");
-#else
-    auto rv = system("rm -f logs/*");
-#endif
-}

tests/utils.cpp

@@ -0,0 +1,11 @@
+#include "includes.h"
+
+void prepare_logdir()
+{
+    spdlog::drop_all();
+#ifdef _WIN32
+    auto rv = system("del /F /Q logs\\*");
+#else
+    auto rv = system("rm -f logs/*");
+#endif
+}

tests/utils.h

@@ -0,0 +1,4 @@
+#pragma once
+
+void prepare_logdir();
+