c# - Testing how many time a for loop has run -

hi have method witch has 2 loops.the method looks this:

 public elearningsessionsdto filterelearningsession(ienumerable<getelearningsessionsforstudent_result> elearningsession)     {         var elearningsessiondto = new elearningsessionsdto();         var clossedlessons = new list<lessonsinelearningdto>();         var plannedlessons = new list<lessonsinelearningdto>();          var grouplessons = elearningsession.groupby(key => new { key.lessonnumber, key.lessontitle, key.targetdate },                                                     data => new { data.status, data.eventtitle });          foreach (var grouplesson in grouplessons)         {             bool isplanned = false;              var lessoninelearningdto = new lessonsinelearningdto             {                 lessonnumber = grouplesson.key.lessonnumber,                 lessontitle = grouplesson.key.lessontitle,                 targetdate = grouplesson.key.targetdate             };             var assignmentsinlessondto = new list<assignmentsinlessondto>();              foreach (var assignment in grouplesson)             {                 var assignmentinlessondto = new assignmentsinlessondto                 {                     eventtitle = assignment.eventtitle,                     status = assignment.status                 };                  if (assignment.status != (int)elearningeventsubscriptionstatuses.closed)                 {                     isplanned = true;                 }                 assignmentsinlessondto.add(assignmentinlessondto);             }              lessoninelearningdto.lessonsassignments = assignmentsinlessondto;              if (isplanned)             {                 plannedlessons.add(lessoninelearningdto);             }             else             {                 clossedlessons.add(lessoninelearningdto);             }         }          elearningsessiondto.clossedlessons = clossedlessons;         elearningsessiondto.plannedlessons = plannedlessons;          return elearningsessiondto;     } 

i want 2 create 2 unit tests it.one verifying how many times first foreach loop called.and second verifying how many times second foreach loop called.

i using moq mocking framework , in kind of scenarios have aditional method called external class , using able determine how many times in loop method called.but in current scenario can not find way test this.

can give ideea on how should proceed?