Writing test case for static method with linq in moq

Question

Hi , Am new to mock test, am trying to write a test case for the follwing method could shed some light of checking the collection in a simple through mock .And this is static method.

 

ACollection obj = (ACollection)aCollection.Filter();
               var result = aCollection.Where(a => a.IsConditionEvaluatedAndTrue())
                  .Select(arg =>
                  new KeyValuePair<int, WebArg>(arg.Key,
                      new WebArg(arg) { IsConditionTrue = true }))
                  .OrderByDescending(pair =>
                  WebArg.MapAllSupportLevelsToNumeric(pair.Value.VerboseArgumentLevel))
                  .ToDictionary(pair => pair.Key, pair => pair.Value);
               return result;