NOTE:- In MassLeadConverterControllerTest  you need to update below code.

@isTest
private class MassLeadConverterControllerTest {

    static testMethod void massLeadTest() {
        // set up account
        Account acc = new Account();
        acc.Name = 'Acme Account Test';
        acc.BillingCountry = 'US'; //-------------> Please enter a valid country here
        acc.ShippingCountry = 'US'; //-------------> Please enter a valid country here
        acc.BillingState = 'IL'; //-------------> Please enter a valid state here
        insert acc;
       
       
        // set up leads
        List<Lead> testLeads = new List<Lead>();
        Lead lead1 = new Lead();
        lead1.Company = 'Test 1 New Company';
        lead1.LastName = 'Martha';
        lead1.LeadSource = 'Not Converted';
        testLeads.add(lead1);
       
        Lead lead2 = new Lead();
        lead2.Company = 'Test 12';
        lead2.LastName = 'Jordan';
        lead2.LeadSource = 'Not Converted';
        testLeads.add(lead2);
       
        Lead lead3 = new Lead();
        lead3.Company = 'Test 3';
        lead3.LastName = 'Paul';
        lead3.LeadSource = 'Not Converted';
        testLeads.add(lead3);   
       
         Lead lead4 = new Lead();
        lead4.Company = 'Test 1';
        lead4.LastName = 'Cathy';
        lead4.LeadSource = 'Not Converted';
        testLeads.add(lead4);   
       
        Lead lead5 = new Lead();
        lead5.Company = 'Test 1';
        lead5.LastName = 'Dereck';
        lead5.LeadSource = 'Not Converted';
        testLeads.add(lead5);  
  
        Lead lead6 = new Lead();
        lead6.Company = 'Test 1';
        lead6.LastName = 'Benjamin';
        lead6.LeadSource = 'Not Converted';
        testLeads.add(lead6);   
       
        Lead lead7 = new Lead();
        lead7.Company = 'Test 1';
        lead7.LastName = 'Franklin';
        lead7.LeadSource = 'Not Converted';
        testLeads.add(lead7);  
       
        insert testLeads;
                            
        // set up extension
        List<Lead> selectedLeads = new List<Lead>();
        selectedLeads.add(lead1);
        selectedLeads.add(lead2);
        ApexPages.Standardsetcontroller con = new ApexPages.Standardsetcontroller(selectedLeads);
           con.setSelected(selectedLeads);
           MassLeadConverterController mlc = new MassLeadConverterController(con);
          
        // try with new account
           mlc.leadTask.ActivityDate = System.today();
           mlc.leadTask.Subject = 'hi';
           mlc.leadTask.Status = 'In Progress';             
           mlc.leadTask.Priority = 'High';
           mlc.oppOption = 'Create an opportunity for each lead';
           mlc.convertLeads();
          
           List<Contact> resultingContacts = [select Id from Contact Where Account.Name = 'Test 1 New Company'];
        System.assertEquals(2, resultingContacts.size());
        List<Opportunity> resultingOpp = [select Id from Opportunity Where Opportunity.Name = 'Test 1 New Company'];
        System.assertEquals(2, resultingOpp.size());
  
       
         // re-set up extension
        selectedLeads = new List<Lead>();
        selectedLeads.add(lead3);
        con = new ApexPages.Standardsetcontroller(selectedLeads);
           con.setSelected(selectedLeads);
           mlc = new MassLeadConverterController(con);
          
        // try with existing account and do not create opportunity
        mlc.accOption = 'Add to existing account';
        mlc.con.AccountId = acc.Id;
           mlc.leadTask.ActivityDate = System.today();
           mlc.leadTask.Subject = 'hi';
           mlc.leadTask.Status = 'In Progress';              
           mlc.leadTask.Priority = 'High';
           mlc.oppOption = 'Do not create new opportunity';
          
           mlc.convertLeads();
          
           resultingContacts = [select Id from Contact Where AccountId = :acc.Id];
        System.assertEquals(1, resultingContacts.size());
        resultingOpp = [select Id from Opportunity Where Opportunity.Name = 'Acme Account Test'];
        System.assertEquals(0, resultingOpp.size());     
       
         // re-set up extension
        selectedLeads = new List<Lead>();
        selectedLeads.add(lead4);
        selectedLeads.add(lead5);
        con = new ApexPages.Standardsetcontroller(selectedLeads);
           con.setSelected(selectedLeads);
           mlc = new MassLeadConverterController(con);
          
        // try with existing account and only create one opportunity and a task for each lead
        mlc.accOption = 'Add to existing account';
        mlc.con.AccountId = acc.Id;
           mlc.leadTask.ActivityDate = System.today();
           mlc.leadTask.Subject = 'hi';
           mlc.leadTask.Status = 'In Progress';              
           mlc.leadTask.Priority = 'High';
           mlc.oppOption = 'Combine all leads into a single opportunity';
           mlc.taskOption = 'Create a task for each lead';
           mlc.opportunityName = 'acme opp';
          
           mlc.convertLeads();
          
           resultingContacts = [select Id from Contact Where AccountId = :acc.Id];
        System.assertEquals(3, resultingContacts.size());
        resultingOpp = [select Id from Opportunity Where Opportunity.Name = 'acme opp'];
        System.assertEquals(1, resultingOpp.size());           

      // re-set up extension
        selectedLeads = new List<Lead>();
        selectedLeads.add(lead6);
        selectedLeads.add(lead7);
        con = new ApexPages.Standardsetcontroller(selectedLeads);
           con.setSelected(selectedLeads);
           mlc = new MassLeadConverterController(con);
          
        // try with existing account and only create one opportunity and a task for each lead
        mlc.accOption = 'Add to existing account';
        mlc.con.AccountId = acc.Id;
           mlc.leadTask.ActivityDate = System.today();
           mlc.leadTask.Subject = 'hi';
           mlc.leadTask.Status = 'In Progress';              
           mlc.leadTask.Priority = 'High';
           mlc.oppOption = 'Create an opportunity for each lead';
           mlc.taskOption = 'Create a task for each lead';
           mlc.opportunityName = 'multiple opps';
          
           mlc.convertLeads();
          
           resultingContacts = [select Id from Contact Where AccountId = :acc.Id];
        System.assertEquals(5, resultingContacts.size());
        resultingOpp = [select Id from Opportunity Where Opportunity.Name = 'multiple opps'];
        System.assertEquals(2, resultingOpp.size());          
               
          // re-set up extension
        selectedLeads = new List<Lead>();
        con = new ApexPages.Standardsetcontroller(selectedLeads);
           con.setSelected(selectedLeads);
           mlc = new MassLeadConverterController(con);
        System.assertEquals(false, mlc.isEditable);
       
    }
}


-----------------

public class test_updatecontactrolecount
{
 public static testMethod void testcreateopptywithconditionandrole()
{
//Insert Opportunities
try
{
    Opportunity Oppty = new Opportunity(Name='Oppty_test1',StageName='Stage 1 - Unqualified Prospect',Type ='New Business', CloseDate=System.Today());
    insert Oppty;
   
    // insert contact
    Contact[] cont = new Contact[]
    {
        new Contact(LastName = 'testcontact1'),
        new Contact(LastName = 'testcontact2')
    };   
    insert cont;   
    // insert contact role    
    OpportunityContactRole [] ocr = new OpportunityContactRole[]
    {
    new OpportunityContactRole(Role ='Business User',OpportunityId=Oppty.id ,Contactid = cont[0].id ,Isprimary = True),
    new OpportunityContactRole(Role ='Business User',OpportunityId=Oppty.id ,Contactid = cont[0].id ,Isprimary = False)
    };
    insert ocr;   
    Oppty.StageName = 'Stage 3 - Eval Request';   
    //Update opportunity
   
    Test.StartTest();
    update Oppty;
    Test.StopTest();
   
    Oppty =[SELECT Number_of_Contacts_Roles_Assigned__c,Primary_Contact_Assigned__c FROM Opportunity WHERE Id = :Oppty.Id];
    system.assert (Oppty.Number_of_Contacts_Roles_Assigned__c == 2);
    system.assert (Oppty.Primary_Contact_Assigned__c == True);
}
catch (System.DmlException e)
{
    //System.assert(false);
}       
}
}

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