Revize 3729dcae

re #9037 Empty input testing

Server/ServerApp/Parser/Parsers/LogInParser.cs

@@ -87 +87 @@
             List<ActivityInfo> loginInfo = new List<ActivityInfo>();
 
             List<LogInInstance> list = loader.LoadLoginFile(path);
-            if (list == null)
+            if (list == null || list.Count == 0)
                 return loginInfo;
 
             // data for each faculty
@@ -173 +173 @@
             List<ActivityInfo> loginInfo = new List<ActivityInfo>();
             
             List<LogInInstance> list = loader.LoadLoginFile(path);
-            if (list == null)
+            if (list == null || list.Count == 0)
                 return loginInfo;
 
             // min/max hour taken into account