My Class:

public class getDealPendingApproval{
  
Public class wrapperClass{
       public Boolean checked{get; set;}
       public ID approvalProcessID{get; set;}
       public ID DealsRecordID{get; set;}
       public String payname{get; set;}
       public String customer_no{get; set;}
       public String customer_name{get; set;}
       public String period{get; set;}
       public String deal_id{get; set;}
       public String status{get; set;}
       public String DateStart {get; set;}
       public String VendorNumber {get; set;}
       public String DateEnd {get; set;}
       public String schemeType {get; set;}
       public wrapperClass(){}   
   }
   public String stringCustomer {get;set;}
   Set<ID> paySet = new Set<ID>();
   Map<Id, Id> processMap = new Map<Id, Id>();
   public List<wrapperClass> wrapClassList{get; set;}
   public List<wrapperClass> wrapClassHeldList{get; set;}
   public List <Deals__c> payList {get;set;}
  
   public List<wrapperClass> wrapList{get; set;}
   //Number of records to be shown in each
   public Integer intPageSize {get; set;}
   //Total number of records in the search results list
   public Integer intRecordSize {get; set;}
   public ApexPages.StandardSetController con{ get; set;}
   //Total number of records in the search results list
   public integer intTotalRecords{get; set;}
  
   //returns the results list to be displayed on the screen
   public List<wrapperClass> testList{
    get{
        List<wrapperClass> lstWrap = new List<wrapperClass>();
      if(wrapList!=null && wrapList.size()>0){
        List<Deals__c> lstDeals = con.getRecords();
        For(Deals__c obj :  lstDeals){
            for(wrapperClass ow : wraplist){
                if(ow.DealsRecordID == obj.id){
                    lstWrap.add(ow);
                }
            }
        }
        return lstWrap;
      }else{
        return null;
      }
    }
    set;
  }
  
  
   public pageReference doAction(){
        wrapList = getDeals(stringCustomer);     
        setResultsInController(wrapList);
        return null;
   }
  

  private void setResultsInController(List<wrapperClass> wrapList){
 
      intPageSize = 1;
      Set<String> DealsRecordIds = new Set<string>();
      for(wrapperClass obj : wrapList){
        DealsRecordIds.add(obj.DealsRecordID);
      }
     
      con  =  new ApexPages.StandardSetController([Select id from Deals__c where id in :DealsRecordIds order by createdDate desc]);
      con.setPageSize(intPageSize);
      integer intResultSize = con.getResultSize();
      if(math.mod(intResultSize,intPageSize) == 0)
        intRecordSize = (con.getResultSize())/intPageSize;
      else
        intRecordSize = ((con.getResultSize())/intPageSize) +1;
      intTotalRecords=wrapList.size();
   
  }
  
  
   public List<wrapperClass> getDeals(String strCustomer){
   List<Approval.ProcessWorkitemRequest> PWRList  = new List<Approval.ProcessWorkitemRequest>();
   wrapClassList = new List <wrapperClass>();
 
   // get the queues which the user belongs to
   List<GroupMember> queues = [SELECT GroupId FROM GroupMember where UserOrGroupId  = :userInfo.getUserID()];
   List<String> users = new List<String>();
   users.add(userInfo.getUserID());
   //add the queues to which the user belongs
   for( GroupMember grp : queues){
       users.add(grp.GroupId);
   }
  
  // List<ProcessInstanceWorkitem> piwiList = [SELECT ActorId,Id,IsDeleted,ProcessInstanceId, ProcessInstance.targetobjectid
    //      FROM ProcessInstanceWorkitem where actorid = :userInfo.getUserID()];
   
    List<ProcessInstanceWorkitem> piwiList = [SELECT ActorId,Id,IsDeleted,ProcessInstanceId, ProcessInstance.targetobjectid
          FROM ProcessInstanceWorkitem where actorid in :users];
         
  
   if(!piwiList.isempty()){  
         // create a set of the Deals ids
               
       for (ProcessInstanceWorkitem piwi : piwiList){
               if(String.valueof(piwi.ProcessInstance.targetobjectid.getSobjectType())== 'Deals__c'){
                   paySet.add(piwi.ProcessInstance.targetobjectid);
                   processMap.put(piwi.ProcessInstance.targetobjectid, piwi.id);
                  
               }
       }
      
            payList = [select id, Customer_Name__c, Customer_no__r.name, Customer_no__r.schemeType__c,  Deal_Id_Hidden__c, Deal_ID__c, DateEnd__c, VendorNumber__c, DateStart__c, Status_desc__c from Deals__c where id in
                   :paySet ];
      
       
        for(Deals__c pay : payList){
                wrapperClass wrapClass = new wrapperClass();
                wrapClass.checked = false;
                wrapClass.approvalProcessID = processMap.get(pay.id);
              
                wrapClass.DealsRecordID = pay.id;
                wrapClass.customer_no = pay.Customer_no__r.name;
                wrapClass.customer_name = pay.Customer_Name__c;
                //wrapClass.period = pay.period__c;
                wrapClass.deal_id =pay.Deal_Id_Hidden__c;
                wrapClass.status = pay.Status_desc__c;
                wrapclass.schemeType= pay.Customer_no__r.schemeType__c;
                wrapClass.DateEnd =  pay.DateEnd__c.day() + '-' + pay.DateEnd__c.month() + '-' + pay.DateEnd__c.year();
                wrapClass.VendorNumber =  pay.VendorNumber__c;
                wrapClass.DateStart = pay.DateStart__c.day() + '-' + pay.DateStart__c.month() + '-' + pay.DateStart__c.year();
                wrapClassList.add(wrapClass);
          }   
         }
    
   return wrapClassList;        
   } // end of getDeals
      
}


Test Class:


@isTest(seeAllData=true)
private class Test_getDealPendingApproval
{
static testMethod void testTrigger()
{
getDealPendingApproval pdd= new getDealPendingApproval();

Deals__c deal= new Deals__c();
insert deal;

Test.StartTest();
pdd.doAction();
pdd.getDeals('test');
Test.StopTest();
}
}

Need Help in Code coverage. Currently coverage is 55%.