Add unit tests for SAO load / unload behaviour

src/unittest/mock_server.h

@@ -19,7 +19,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #pragma once
 
-#include <server.h>
+#include "server.h"
 
 class MockServer : public Server
 {
@@ -31,6 +31,9 @@ public:
 		)
 	{}
 
+	void start() = delete;
+	void stop() = delete;
+
 private:
 	void SendChatMessage(session_t peer_id, const ChatMessage &message) {}
 };