My Test Class is :

@isTest
private class testclassperformancereport
{
   static testmethod void myTestclass()
   {
     
      datetime nowdate = datetime.now();
     
      datetime newdate= nowdate.addMonths(2);
     
      PerformanceReport pr = new PerformanceReport();
     
      pr.strFromDate = nowdate.format('MM/dd/yyyy hh:mm a');  
      pr.strToDate = newdate.format('MM/dd/yyyy hh:mm a');
     
      PerformanceReport.PerformanceReportClass prc = new PerformanceReport.PerformanceReportClass();
     
      list<PerformanceReportClass> c = new List<PerformanceReportClass>();
     
      PerformanceReport.ReqmtDetailsClass rdc = new PerformanceReport.ReqmtDetailsClass();
     
      PerformanceReport.CandtDetailsClass cdc = new PerformanceReport.CandtDetailsClass();
      
      User mrActUser = [SELECT id, name, LastModifiedDate from user where userroleid in (select id from userrole where name='Management Representative') and isActive = True limit 1];
     
      List<RequirementAssignment__c> lstReqmtAssign = new List<RequirementAssignment__c>();
     
      List<Requirement__c> lstReqmts = new List<Requirement__c>();
    
      datetime startdate = datetime.parse(pr.strFromDate);
      system.debug('startdate :' + startdate);
      
      datetime enddate = datetime.parse(pr.strToDate);
      system.debug('enddate :' + enddate);
     
      System.test.startTest();
     
      Requirement__c reqmc=new Requirement__c();
           
      reqmc.Name='SampathReq';
      reqmc.Job_Title__c='.net';     
      reqmc.Duration__c='6';
      reqmc.No_Of_Resumes__c=2;
      reqmc.Min_Cost__c=100;
      reqmc.Max_Cost__c=200;
      reqmc.Rate__c=200;
      reqmc.Rate_Basis__c='Hourly';
      reqmc.Status__c='open';
      reqmc.Position_Type__c='Contract';
      reqmc.State__c='CA';
      reqmc.City__c='CA';
      reqmc.Est_Start_Date__c=date.today();
               
      insert reqmc;
     
      Candidate__c candc=new Candidate__c();
                       
      candc.Name='test';
      candc.Last_name__c='testonek';
      candc.Current_city__c='chennai';
      candc.Current_state__c='Maine';
      candc.Gender__c='Male';
      candc.Employer_Name__c='ttt';
      candc.Email__c='test@gmail.com';
      candc.interview_contact_phone__c='Mobile Phone';
      candc.Contract_type__c='Corp to Corp';
      candc.visa_type__c='H1 B';
      candc.cost__c =100;
      candc.mobile_phone_no__c='9890043500';
      candc.employer_contact_email__c='test@gmail.com';
      candc.Employer_Contact_Name_Name__c='tt';
      candc.Employer_Mobile_No__c='9988009876';      
      candc.Employer_Name__c = 'jos';
      candc.Employer_Work_Phone_No__c = '(425) 264-6771';             
      candc.Followup_Date__c =date.today();   

      insert candc;
     
      Candidate_Mapping__c candmapc = new Candidate_Mapping__c();

      candmapc.Candidate__c=candc.id;     
     
      RequirementAssignment__c reqassc = new RequirementAssignment__c();
       
      reqassc.Requirement__c = reqmc.id;
      reqassc.AssignStatus__c= 'true';
      reqassc.Won__c= 'no';
  
      insert reqassc;
               
      candmapc.Requirement__c=reqmc.id;
      candmapc.Employer_s_Authorization__c = 'test';
      candmapc.status1__c = 'Applied'; 
      candmapc.LR_Comments__c = 'test by lr';
      candmapc.MR_Comments__c = 'test by MR';
      candmapc.Requirement_Owner_Email__c = 'testOwner@preludesys.com';
      candmapc.Manager_Email_ID__c = 'testOwner1@preludesys.com';
      candmapc.LR_Status__c = 'Approved';
      candmapc.MR_Status__c = 'Approved';
      candmapc.LR_Status_Date__c = string.valueOf(date.today());             
      candmapc.Submitted_to_Client__c = 'Yes';
      candmapc.Interview_Scheduled__c = 'Yes';
      candmapc.Interview_Accepted__c = 'Yes';
      candmapc.Client_Interviewed__c = 'Yes';
      candmapc.Client_Offered__c = 'Yes';
      candmapc.Comments__c = ''; 
      candmapc.MR_Status1__c = 'Approved' ;

      insert candmapc;
     
      pr.GetReportDetails();
     
    
   }
}