public with sharing class EF_WorkItemStatus_EmailTemplate{

public Id efid{get; set;}
public Map<String, String>userdetailsmap{get;set;}
public EF_Request__c email_ef_req = new EF_Request__c();
public EF_Requested__c email_ef_req_res = new EF_Requested__c();
public Map<EF_Application_Form_Values__c, Boolean> oktatargetmap{get; set;}
public Map<Id,Map<String, EF_Application_Form_Values__c>>finalformlist = new Map<Id,Map<String, EF_Application_Form_Values__c>>();
public Boolean oldvalpresent{get; set;}
public List<EF_Application_Form_Values__c> ef_application_formlist = new List<EF_Application_Form_Values__c>();
public String targetlist{get;set;}

   
    public EF_WorkItemStatus_EmailTemplate()
    {
       
    }
    public EF_Requested__c getemail_ef_req_res()
    {
      try
      {
            email_ef_req_res = [Select Id, EFReq_User__r.Name, EF_Resource_Metadata__r.Name, Working_by__c, Work_Item_Status__c, EF_Request_ID__c from EF_Requested__c where Id=:efid];
            email_ef_req = [select id, OKTA_User_attributes__c, Submitted_By__r.Okta_Id__c, User_Name__r.Okta_Id__c, User_Name__r.ManagerId, User_Name__c, User_Name__r.Name, Submitted_By__c, Submitted_By__r.Name, Manager__c, Manager_ID__r.Name from EF_Request__c where Id=:email_ef_req_res.EF_Request_ID__c ];
      }catch(Exception e)
      {
            ApexPages.addMessages(e);
      }
        return email_ef_req_res;
    }
 
    public Map<String, String>getUserdetails()
    {
      EF_Requested__c email_ef_requested = [Select Id, EF_Request_ID__r.OKTA_User_attributes__c from EF_Requested__c where id=:efid];
        
        userdetailsmap = new Map<String, String>();
        try
        {
          String oktaid = email_ef_requested.EF_Request_ID__r.OKTA_User_attributes__c;
            if(oktaid != null && oktaid != '')
            {
                String test = oktaid.replaceAll('"','');
        String test1 = test.replace('{','');
        String test2 = test1.replace('}','');             
              List<String>strings = test2.split(',', 0);
             
              for(Integer i=0; i<strings.size(); i++)
              {
                List<String>s = strings[i].split(':',2);
                userdetailsmap.put(s[0], s[1]);
              }
            }
        }
        catch(Exception e)
        {
            ApexPages.addMessages(e);
        }
        if(userdetailsmap.containsKey('employeeType'))
        {
          if(userdetailsmap.get('employeeType')==null)
              userdetailsmap.put('employeeType','');
        }
        else
          userdetailsmap.put('employeeType','');
         
        if(userdetailsmap.containsKey('managerID'))
        {
          if(userdetailsmap.get('managerID')==null)
              userdetailsmap.put('managerID','');
        }
        else
          userdetailsmap.put('managerID','');
         
         if(userdetailsmap.containsKey('IDM_AD_MailStop'))
        {
          if(userdetailsmap.get('IDM_AD_MailStop')==null)
              userdetailsmap.put('IDM_AD_MailStop','');
        }
        else
          userdetailsmap.put('IDM_AD_MailStop','');
           
        if(userdetailsmap.containsKey('AGNLoginID'))
        {
          if(userdetailsmap.get('AGNLoginID')==null)
              userdetailsmap.put('AGNLoginID','');
        }
        else
          userdetailsmap.put('AGNLoginID','');
       
        if(userdetailsmap.containsKey('IDMCPID'))
        {
          if(userdetailsmap.get('IDMCPID')==null)
              userdetailsmap.put('IDMCPID','');
        }
        else
          userdetailsmap.put('IDMCPID','');
           
        if(userdetailsmap.containsKey('IDMCostCenter'))
        {
          if(userdetailsmap.get('IDMCostCenter')==null)
              userdetailsmap.put('IDMCostCenter','');
        }
        else
          userdetailsmap.put('IDMCostCenter','');
         
    if(userdetailsmap.containsKey('employeeID'))
        {
          if(userdetailsmap.get('employeeID')==null)
              userdetailsmap.put('employeeID','');
        }
        else
          userdetailsmap.put('employeeID','');
         
        if(userdetailsmap.containsKey('IDMSAPLogon'))
        {
          if(userdetailsmap.get('IDMSAPLogon')==null)
              userdetailsmap.put('IDMSAPLogon','');
        }
        else
          userdetailsmap.put('IDMSAPLogon','');

        if(userdetailsmap.containsKey('firstName'))
        {
          if(userdetailsmap.get('firstName')==null)
              userdetailsmap.put('firstName','');
        }
        else
          userdetailsmap.put('firstName','');
         
    if(userdetailsmap.containsKey('lastName'))
        {
          if(userdetailsmap.get('lastName')==null)
              userdetailsmap.put('lastName','');
        }
        else
          userdetailsmap.put('lastName','');
         
    if(userdetailsmap.containsKey('email'))
        {
          if(userdetailsmap.get('email')==null)
              userdetailsmap.put('email','');
        }
        else
          userdetailsmap.put('email','');

    if(userdetailsmap.containsKey('telephoneNumber'))
        {
          if(userdetailsmap.get('telephoneNumber')==null)
              userdetailsmap.put('telephoneNumber','');
        }
        else
          userdetailsmap.put('telephoneNumber','');
         
     if(userdetailsmap.containsKey('IDMSecureTokenSite'))
        {
          if(userdetailsmap.get('IDMSecureTokenSite')==null)
              userdetailsmap.put('IDMSecureTokenSite','');
        }
        else
          userdetailsmap.put('IDMSecureTokenSite','');
        return userdetailsmap;
    }
   
    public Map<String, EF_Application_Form_Values__c> getFinalformlist()
    {
        Map<String, EF_Application_Form_Values__c> formvaluesMap = new Map<String, EF_Application_Form_Values__c>();
        Map<String, EF_Application_Form_Values__c>criteria_fields = new Map<String, EF_Application_Form_Values__c>();
        List<EF_Decision_Criteria__c> efdeclist = new List<EF_Decision_Criteria__c>();
        EF_Application_Form_Values__c ef = new EF_Application_Form_Values__c();
        oktatargetmap = new Map<EF_Application_Form_Values__c, Boolean>();
        targetlist = '';
        Integer j=0;
        try
        {
            ef_application_formlist = [Select Id, Target_System_Translation__c, OKTA_Name__c, EF_Requested_Resource__r.EF_Request_ID__c, EF_Requested_Resource__r.EF_Resource_Metadata__r.Name, Form_Field_name__c, Form_Field_Old_Value__c, Form_Field_New_Value__c From EF_Application_Form_Values__c where EF_Requested_Resource__c=:efid and Form_Field_name__c != 'instructionRequired'];     
           
            //checking if old value and new value are different for oktaname 'role' and not displaying it
            for(EF_Application_Form_Values__c efa: ef_application_formlist)
            {
                oktatargetmap.put(efa, false);
            }
            for(Integer i=0; i<ef_application_formlist.size(); i++)
            {
                if(ef_application_formlist[i].EF_Requested_Resource__r.EF_Resource_Metadata__r.Name == 'CORAL' || ef_application_formlist[i].EF_Requested_Resource__r.EF_Resource_Metadata__r.Name=='BOXI')
                {
                    if(ef_application_formlist[i].Form_Field_New_Value__c!=ef_application_formlist[i].Form_Field_Old_Value__c && ef_application_formlist[i].OKTA_Name__c=='roles')
                    {
                        if(targetlist == '')
                            targetlist = ef_application_formlist[i].Target_System_Translation__c;
                        else
                            targetlist = targetlist+','+ef_application_formlist[i].Target_System_Translation__c;
                        if(j==1)                       
                            ef_application_formlist.remove(i);
                        else
                            ef = ef_application_formlist[i];
                        j=1;
                    }
                }
                //oktatargetmap.put(ef_application_formlist[i], false);
            }
            oktatargetmap.put(ef, true);
            oldvalpresent=false;       
            for(EF_Application_Form_Values__c efa: ef_application_formlist)
            {
                String s = efa.EF_Requested_Resource__r.EF_Resource_Metadata__r.Name+'_'+efa.Form_Field_name__c;
                if(efa.Form_Field_Old_Value__c != null && efa.Form_Field_Old_Value__c != '' && (efa.Form_Field_Old_Value__c != efa.Form_Field_New_Value__c))
                    oldvalpresent=true;
                criteria_fields.put(s.toLowerCase(), efa);
                s = null;  
            }
            efdeclist = [Select Criteria__c, Form_Field_Label__c from EF_Decision_Criteria__c where Criteria__c in:criteria_fields.keySet()];
            for(EF_Decision_Criteria__c e: efdeclist)
            {
                if(criteria_fields.containsKey(e.Criteria__c.toLowerCase()))
                {
                        formvaluesMap.put(e.Form_Field_Label__c, criteria_fields.get(e.Criteria__c.toLowerCase()));
                }
            }
        }catch(Exception e)
        {
            ApexPages.addMessages(e);
        }
        return formvaluesMap;
    }
}

Hi friends 
Plz help me out in writing test class for the below class 




public class EF_UpdateOKTA
{
    public EF_UpdateOKTA()
    {
        UpdateEFKotaQueue();
    }
    public void UpdateEFKotaQueue()
    {
        List<string> lstEF_OKTA_QueueID = new List<string>();
        /*string strQuery =  EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Type__c + ' ' + EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Fields__c +
                           EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Relationship_fields__c + ' from ' +  EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Object__c +
                           ' where ' + EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Filter__c;
        system.debug('strQuery strQuery strQuery ::' + strQuery );
        List <EF_OKTA_Queue__c> lstEFOKTA_Queue_QueryData = Database.Query(strQuery);*/
       
        List <EF_OKTA_Queue__c> lstEFOKTA_Queue_QueryData = [SELECT Id, status__c, EF_Requested_Resource__c, OKTA_JSON__c,OKTA_Response__c, number_tried__c, EF_Requested_Resource__r.EF_Resource_Metadata__r.OKTA_App_ID__c, EF_Requested_Resource__r.EF_Request_ID__r.User_Name__r.Okta_Id__c, EF_Requested_Resource__r.Request_Type__c from EF_OKTA_Queue__c where status__c='Request Sent' and number_tried__c<10 limit 10];
        system.debug('lstEFOKTA_Queue_QueryDatalstEFOKTA_Queue_QueryData::' + lstEFOKTA_Queue_QueryData);
        
        for(EF_OKTA_Queue__c objEF_OKTA_Queue_Local : lstEFOKTA_Queue_QueryData)
        {
            lstEF_OKTA_QueueID.add(objEF_OKTA_Queue_Local.Id);
        }
       
        if(lstEF_OKTA_QueueID.size()>0)
        {
            list<EF_OKTA_Queue__c> lstEfOKtatoUpdate = new list<EF_OKTA_Queue__c>();
            for(EF_OKTA_Queue__c oQueue: [select id, EF_Requested_Resource__r.EF_Request_ID__r.Okta_Id__c,
                            EF_Requested_Resource__r.EF_Request_ID__r.User_Name__r.Okta_Id__c,
                            OKTA_JSON__c, number_tried__c, EF_Requested_Resource__r.Request_Type__c,
                            EF_Requested_Resource__r.EF_Resource_Metadata__r.OKTA_App_ID__c, Status__c
                            from EF_OKTA_Queue__c
                            where id in : lstEF_OKTA_QueueID])
            {
                string userID = oQueue.EF_Requested_Resource__r.EF_Request_ID__r.Okta_Id__c!=''?
                                oQueue.EF_Requested_Resource__r.EF_Request_ID__r.Okta_Id__c:oQueue.EF_Requested_Resource__r.EF_Request_ID__r.User_Name__r.Okta_Id__c;

                string appID = oQueue.EF_Requested_Resource__r.EF_Resource_Metadata__r.OKTA_App_ID__c;
               
                string strURLEnd = OKTA_EndPoint__c.getValues('OKTA').Site_URL__c;
                strURLEnd = strURLEnd + '/apps/' + appID + '/users/' + userID;
               
                String result     = '[]';
                String authToken    = OKTA_EndPoint__c.getValues('OKTA').Auth_token__c;
                Http h = new Http();
                HttpRequest req   = new HttpRequest();
                req.setEndpoint(strURLEnd);
                req.setMethod('GET');
                req.setHeader('Accept', 'application/json');
                req.setHeader('Authorization', authToken);
               
                HttpResponse res = h.send(req);
               
                if (200 == res.getStatusCode())
                {
                    result = res.getBody();
                    map<string, Object> mapDataToUpdate = (map<string, Object>)JSON.deserializeUntyped(result);
                   
                    if(mapDataToUpdate.get('status') == 'Completed')
                    {
                        oQueue.Status__c = 'Complete';
                        lstEfOktatoUpdate.add(oQueue);
                    }
                }
            }
           
            if(lstEfOKtatoUpdate.size()>0)
            {
                try{update lstEfOKtatoUpdate;}
                catch(Exception ex){EF_Error_Log.logException('EF_OKTA_Queue', lstEfOKtatoUpdate, 'DML', 'HIGH', ex.getMessage());
                }
            }
        }
    }


}





=====================================================================
I am struggling with the Error  test fail 


@isTest
private class EF_UpdateOKTA_Test {


    //There are three A's(Arrange, Act, Assert) that you'll need to take care of in your test class

     static testMethod void testCallout() {
      
        /* Populate Test data, in your case in EF_abc_Queue__c object and other parent object where the data is being pulled up by the SOQL you
        have in actuall class satisfying the WHERE condition(where status__c='Request Sent' and number_tried__c<10)
        Also you need to populate data into the custom setting abc_EndPoint__c
        This is where you are arranging the test data
        */
        profile p =[select id from Profile WHERE Name ='Standard User' LIMIT 1];       
         User user = new User();
        //Populate data for rest of the fields
        user.Alias = 'rrn';
        user.username = 'ganga@g.com';
        user.Email = 'rg@h.com';
        user.CommunityNickname ='raj';
        user.ProfileId = p.id;
        user.LastName = 'ganga';
        user.TimeZoneSidKey = 'America/Los_Angeles';
        user.LocaleSidKey = 'en_US';
        user.EmailEncodingKey = 'UTF-8';
        user.LanguageLocaleKey = 'en_US';
        user.Okta_Id__c = 'hi';
       
        insert user;
      
        EF_Request__c efreqobj = new EF_Request__c();
    
     efreqobj.Okta_Id__c = 'abc';
     insert efreqobj;
    
    EF_Requested__c efreqstedobj = new EF_Requested__c();
   
    efreqstedobj.EF_Request_ID__c = efreqobj.id ;
   
    efreqstedobj.Request_Type__c = 'Phone';
   
   insert  efreqstedobj;
  
   EF_Resource_Metadata__c efresourceobj =  new EF_Resource_Metadata__c();
  
   efresourceobj.Name = 'abhi';
   efresourceobj.OKTA_App_ID__c ='abcd';
  
   insert efresourceobj ;
  
  
   EF_OKTA_Queue__c efoktaQ = new EF_OKTA_Queue__c ();
 
    efoktaQ.EF_Requested_Resource__c = efreqstedobj.id;
    efoktaQ.OKTA_JSON__c = 'Hi';
    efoktaQ.OKTA_Response__c = 'hi this is a test';
    efoktaQ.CurrencyIsoCode = 'USD';
    efoktaQ.status__c = 'Request Sent';
    efoktaQ.Number_Tried__c = 8;
   
    insert efoktaQ;
   
   
     OKTA_EndPoint__c customSetting = new OKTA_EndPoint__c();
        //Populate data for the data set 'abc'
        customSetting.Name = 'testingendpoint';
        insert customSetting;
       
        Test.setMock(HttpCalloutMock.class, new  EF_UpdateOKTA_MockHttpResponseGenerator());
      
        Test.startTest();
        EF_UpdateOKTA testObj = new EF_UpdateOKTA();
       
        Test.stopTest();
      
  
        EF_OKTA_Queue__c q = [Select Status__c from EF_OKTA_Queue__c where Id = :efoktaQ.id];
        System.assert(q.Status__c == 'Complete');
      
    }
}

with one mocktest callout class written in another class already
now the Error message is 

System.NullPointerException: Attempt to de-reference a null object


Class.EF_UpdateOKTA.UpdateEFKotaQueue: line 39, column 1
Class.EF_UpdateOKTA.<init>: line 5, column 1
Class.EF_UpdateOKTA_Test.testCallout: line 78, column 1

Thanks in Advance 

Hi frnds,
Need some help for me 
to write a test class for the below class 

public class EF_GetUserDetailFormOkta_Search_AC
{

       //public String apiEndpoint = OKTA_EndPoint__c.getValues('OKTA').Site_URL__c;
       //public String result      = '[]';
       //public String authToken   = OKTA_EndPoint__c.getValues('OKTA').Auth_token__c;
     
        public string apiEndpoint   = 'http://ec2-user@ec2-54-219-23-118.us-west-1.compute.amazonaws.com:8090/allergan.oktapreview.com/api/v1/';
        public string authToken     = 'SSWS 006BBGUE4NNIpFNpdqUm8EWLELIQuQu-SoasGMeWnV';
        public Integer timeoutOKTA      = 60000; 


   
   
    public string strSearchData {get; set;}
    public List<string> lstData {get; set;}
    public List<WrapUserDetail> lstWrapAllData {get; set;}
   
    public boolean isUserNameSelected{get; set;}
    public boolean isFirstNameSelected{get; set;}
    public boolean isLastNameSelected{get; set;}
    public boolean isEmailSelected{get; set;}
    public boolean isEmployeeIDSelected{get; set;}
    public boolean isCPIDSelected{get; set;}
    public boolean isManagerIDSelected{get; set;}
   
    public class WrapUserDetail
    {
        public string strUserName {get; set;}
        public string strFirstName {get; set;}
        public string strLastName {get; set;}
        public string strTitle {get; set;}
        public string strEmail {get; set;}
        public string strEmployeeID {get; set;}
        public string strCPID {get; set;}
        public string strManager {get; set;}
        public string strLocation {get; set;}
        public string strUserOktaID {get; set;}
       
       
        public WrapUserDetail(string UserOktaID,string UserName, string FirstName, string LastName, string Title, string Email, string EmployeeID, string CPID, string Manager, string Location)
        {
            strUserOktaID = UserOktaID;
            strUserName = UserName;
            strFirstName = FirstName;
            strLastName = LastName;
            strTitle = Title;
            strEmail = Email;
            strEmployeeID = EmployeeID;
            strCPID = CPID;
            strManager = Manager;
            strLocation = Location;
        }
    }
   
    public EF_GetUserDetailFormOkta_Search_AC()
    {
        lstData = new List<string>();
        strSearchData = '';
    }
    public void SearchData()
    {
        lstWrapAllData = new List<WrapUserDetail>();
        string QueryFilter  = CreateSearchString();
        string result = getUserList(QueryFilter);
        List<object> lstAllData = (List<object>)JSON.deserializeUntyped(result);
        system.debug('lstAllDatalstAllDatalstAllData:: ' + lstAllData);
        for(object obj : lstAllData)
        {
           
            Map<string, Object> mapData = (Map<string, Object>)obj;
           
            Map<string, Object> mapProfile = (Map<string, Object>)mapData.get('profile');
            //strUserOktaID
            WrapUserDetail objWrapUserDetail = new WrapUserDetail((string)mapProfile.get('id'),(string)mapProfile.get('AGNLoginID'), (string)mapProfile.get('firstName'), (string)mapProfile.get('lastName'),
                                                                    (string)mapProfile.get('title'), (string)mapProfile.get('email'), (string)mapProfile.get('employeeID'),
                                                                    (string)mapProfile.get('IDMCPID'), (string)mapProfile.get('manager'), (string)mapProfile.get('IDMCORALLocation'));
           
            lstWrapAllData.add(objWrapUserDetail);
        }
    }
   
    /**
     * @author         Krzysztof Wasniowski <k.wasniowski@polsource.com>
     * @version        1.0
     * @date           12/1/2013
     * @description    Returns list of users maching given filter defintion from OCTA API
     * @param          string filterDefinition Filter definition, f.ex: (userName pr or name.givenName eq Edward)
     * @return         string API response (json string)
     * @throws         EF_OKTA_APIException throws an exception is response is not 200 or filter definition is empty
     */
    public String getUserList(string filterDefinition)
    {
        String result       = '[]';
       
        Http h              = new Http();
        HttpRequest req     = new HttpRequest();
        String queryParams  = '?filter=' + EncodingUtil.urlEncode(filterDefinition.trim(), 'UTF-8');
       
        system.debug('queryParamsqueryParamsqueryParams::::New ' + queryParams);
       
        req.setMethod('GET');
        req.setHeader('Accept', 'application/json');
        //req.setTimeout(timeoutOKTA);
        req.setEndpoint(apiEndpoint + '/users' + queryParams);
        req.setHeader('Authorization', authToken);
       
        system.debug('reqreqreqreq:::New ' + req);
       
        HttpResponse res = h.send(req);
        system.debug('resresresres:::New ' + res);
       
        if (200 == res.getStatusCode()) {
            result = res.getBody();
        }
       
        return result;
    }
   
    public string CreateSearchString()
    {
        string strQueryStringToReturn = '';
       
        if(isUserNameSelected)
        {
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.AGNLoginID co ' + '\'' + strSearchData + '\'';
        }
        if(isFirstNameSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.firstName co ' + '\'' + strSearchData + '\'';
        }
        if(isLastNameSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.lastName co ' + '\'' + strSearchData + '\'';
        }
        if(isEmailSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.email co ' + '\'' + strSearchData + '\'';
        }
        if(isEmployeeIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.employeeID co ' + '\'' + strSearchData + '\'';
        }
        if(isCPIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.IDMCPID co ' + '\'' + strSearchData + '\'';
        }
        if(isManagerIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.managerID co ' + '\'' + strSearchData + '\'';
        }
       
        system.debug('strQueryStringToReturn:::: ' + strQueryStringToReturn);
        return strQueryStringToReturn;
    }
}


Thanks in Advance 

Hi friends 
Plz help me out in writing test class for the below class 




public class EF_UpdateOKTA
{
    public EF_UpdateOKTA()
    {
        UpdateEFKotaQueue();
    }
    public void UpdateEFKotaQueue()
    {
        List<string> lstEF_OKTA_QueueID = new List<string>();
        /*string strQuery =  EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Type__c + ' ' + EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Fields__c +
                           EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Relationship_fields__c + ' from ' +  EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Object__c +
                           ' where ' + EF_SOQL_Statements__c.getValues('EF_OKTA_Queue_Batch_Query').Filter__c;
        system.debug('strQuery strQuery strQuery ::' + strQuery );
        List <EF_OKTA_Queue__c> lstEFOKTA_Queue_QueryData = Database.Query(strQuery);*/
       
        List <EF_OKTA_Queue__c> lstEFOKTA_Queue_QueryData = [SELECT Id, status__c, EF_Requested_Resource__c, OKTA_JSON__c,OKTA_Response__c, number_tried__c, EF_Requested_Resource__r.EF_Resource_Metadata__r.OKTA_App_ID__c, EF_Requested_Resource__r.EF_Request_ID__r.User_Name__r.Okta_Id__c, EF_Requested_Resource__r.Request_Type__c from EF_OKTA_Queue__c where status__c='Request Sent' and number_tried__c<10 limit 10];
        system.debug('lstEFOKTA_Queue_QueryDatalstEFOKTA_Queue_QueryData::' + lstEFOKTA_Queue_QueryData);
        
        for(EF_OKTA_Queue__c objEF_OKTA_Queue_Local : lstEFOKTA_Queue_QueryData)
        {
            lstEF_OKTA_QueueID.add(objEF_OKTA_Queue_Local.Id);
        }
       
        if(lstEF_OKTA_QueueID.size()>0)
        {
            list<EF_OKTA_Queue__c> lstEfOKtatoUpdate = new list<EF_OKTA_Queue__c>();
            for(EF_OKTA_Queue__c oQueue: [select id, EF_Requested_Resource__r.EF_Request_ID__r.Okta_Id__c,
                            EF_Requested_Resource__r.EF_Request_ID__r.User_Name__r.Okta_Id__c,
                            OKTA_JSON__c, number_tried__c, EF_Requested_Resource__r.Request_Type__c,
                            EF_Requested_Resource__r.EF_Resource_Metadata__r.OKTA_App_ID__c, Status__c
                            from EF_OKTA_Queue__c
                            where id in : lstEF_OKTA_QueueID])
            {
                string userID = oQueue.EF_Requested_Resource__r.EF_Request_ID__r.Okta_Id__c!=''?
                                oQueue.EF_Requested_Resource__r.EF_Request_ID__r.Okta_Id__c:oQueue.EF_Requested_Resource__r.EF_Request_ID__r.User_Name__r.Okta_Id__c;

                string appID = oQueue.EF_Requested_Resource__r.EF_Resource_Metadata__r.OKTA_App_ID__c;
               
                string strURLEnd = OKTA_EndPoint__c.getValues('OKTA').Site_URL__c;
                strURLEnd = strURLEnd + '/apps/' + appID + '/users/' + userID;
               
                String result     = '[]';
                String authToken    = OKTA_EndPoint__c.getValues('OKTA').Auth_token__c;
                Http h = new Http();
                HttpRequest req   = new HttpRequest();
                req.setEndpoint(strURLEnd);
                req.setMethod('GET');
                req.setHeader('Accept', 'application/json');
                req.setHeader('Authorization', authToken);
               
                HttpResponse res = h.send(req);
               
                if (200 == res.getStatusCode())
                {
                    result = res.getBody();
                    map<string, Object> mapDataToUpdate = (map<string, Object>)JSON.deserializeUntyped(result);
                   
                    if(mapDataToUpdate.get('status') == 'Completed')
                    {
                        oQueue.Status__c = 'Complete';
                        lstEfOktatoUpdate.add(oQueue);
                    }
                }
            }
           
            if(lstEfOKtatoUpdate.size()>0)
            {
                try{update lstEfOKtatoUpdate;}
                catch(Exception ex){EF_Error_Log.logException('EF_OKTA_Queue', lstEfOKtatoUpdate, 'DML', 'HIGH', ex.getMessage());
                }
            }
        }
    }


}





=====================================================================
I am struggling with the Error  test fail 


@isTest
private class EF_UpdateOKTA_Test {


    //There are three A's(Arrange, Act, Assert) that you'll need to take care of in your test class

     static testMethod void testCallout() {
      
        /* Populate Test data, in your case in EF_abc_Queue__c object and other parent object where the data is being pulled up by the SOQL you
        have in actuall class satisfying the WHERE condition(where status__c='Request Sent' and number_tried__c<10)
        Also you need to populate data into the custom setting abc_EndPoint__c
        This is where you are arranging the test data
        */
        profile p =[select id from Profile WHERE Name ='Standard User' LIMIT 1];       
         User user = new User();
        //Populate data for rest of the fields
        user.Alias = 'rrn';
        user.username = 'ganga@g.com';
        user.Email = 'rg@h.com';
        user.CommunityNickname ='raj';
        user.ProfileId = p.id;
        user.LastName = 'ganga';
        user.TimeZoneSidKey = 'America/Los_Angeles';
        user.LocaleSidKey = 'en_US';
        user.EmailEncodingKey = 'UTF-8';
        user.LanguageLocaleKey = 'en_US';
        user.Okta_Id__c = 'hi';
       
        insert user;
      
        EF_Request__c efreqobj = new EF_Request__c();
    
     efreqobj.Okta_Id__c = 'abc';
     insert efreqobj;
    
    EF_Requested__c efreqstedobj = new EF_Requested__c();
   
    efreqstedobj.EF_Request_ID__c = efreqobj.id ;
   
    efreqstedobj.Request_Type__c = 'Phone';
   
   insert  efreqstedobj;
  
   EF_Resource_Metadata__c efresourceobj =  new EF_Resource_Metadata__c();
  
   efresourceobj.Name = 'abhi';
   efresourceobj.OKTA_App_ID__c ='abcd';
  
   insert efresourceobj ;
  
  
   EF_OKTA_Queue__c efoktaQ = new EF_OKTA_Queue__c ();
 
    efoktaQ.EF_Requested_Resource__c = efreqstedobj.id;
    efoktaQ.OKTA_JSON__c = 'Hi';
    efoktaQ.OKTA_Response__c = 'hi this is a test';
    efoktaQ.CurrencyIsoCode = 'USD';
    efoktaQ.status__c = 'Request Sent';
    efoktaQ.Number_Tried__c = 8;
   
    insert efoktaQ;
   
   
     OKTA_EndPoint__c customSetting = new OKTA_EndPoint__c();
        //Populate data for the data set 'abc'
        customSetting.Name = 'testingendpoint';
        insert customSetting;
       
        Test.setMock(HttpCalloutMock.class, new  EF_UpdateOKTA_MockHttpResponseGenerator());
      
        Test.startTest();
        EF_UpdateOKTA testObj = new EF_UpdateOKTA();
       
        Test.stopTest();
      
  
        EF_OKTA_Queue__c q = [Select Status__c from EF_OKTA_Queue__c where Id = :efoktaQ.id];
        System.assert(q.Status__c == 'Complete');
      
    }
}

with one mocktest callout class written in another class already
now the Error message is 

System.NullPointerException: Attempt to de-reference a null object


Class.EF_UpdateOKTA.UpdateEFKotaQueue: line 39, column 1
Class.EF_UpdateOKTA.<init>: line 5, column 1
Class.EF_UpdateOKTA_Test.testCallout: line 78, column 1

Thanks in Advance 

Hi frnds,
Need some help for me 
to write a test class for the below class 

public class EF_GetUserDetailFormOkta_Search_AC
{

       //public String apiEndpoint = OKTA_EndPoint__c.getValues('OKTA').Site_URL__c;
       //public String result      = '[]';
       //public String authToken   = OKTA_EndPoint__c.getValues('OKTA').Auth_token__c;
     
        public string apiEndpoint   = 'http://ec2-user@ec2-54-219-23-118.us-west-1.compute.amazonaws.com:8090/allergan.oktapreview.com/api/v1/';
        public string authToken     = 'SSWS 006BBGUE4NNIpFNpdqUm8EWLELIQuQu-SoasGMeWnV';
        public Integer timeoutOKTA      = 60000; 


   
   
    public string strSearchData {get; set;}
    public List<string> lstData {get; set;}
    public List<WrapUserDetail> lstWrapAllData {get; set;}
   
    public boolean isUserNameSelected{get; set;}
    public boolean isFirstNameSelected{get; set;}
    public boolean isLastNameSelected{get; set;}
    public boolean isEmailSelected{get; set;}
    public boolean isEmployeeIDSelected{get; set;}
    public boolean isCPIDSelected{get; set;}
    public boolean isManagerIDSelected{get; set;}
   
    public class WrapUserDetail
    {
        public string strUserName {get; set;}
        public string strFirstName {get; set;}
        public string strLastName {get; set;}
        public string strTitle {get; set;}
        public string strEmail {get; set;}
        public string strEmployeeID {get; set;}
        public string strCPID {get; set;}
        public string strManager {get; set;}
        public string strLocation {get; set;}
        public string strUserOktaID {get; set;}
       
       
        public WrapUserDetail(string UserOktaID,string UserName, string FirstName, string LastName, string Title, string Email, string EmployeeID, string CPID, string Manager, string Location)
        {
            strUserOktaID = UserOktaID;
            strUserName = UserName;
            strFirstName = FirstName;
            strLastName = LastName;
            strTitle = Title;
            strEmail = Email;
            strEmployeeID = EmployeeID;
            strCPID = CPID;
            strManager = Manager;
            strLocation = Location;
        }
    }
   
    public EF_GetUserDetailFormOkta_Search_AC()
    {
        lstData = new List<string>();
        strSearchData = '';
    }
    public void SearchData()
    {
        lstWrapAllData = new List<WrapUserDetail>();
        string QueryFilter  = CreateSearchString();
        string result = getUserList(QueryFilter);
        List<object> lstAllData = (List<object>)JSON.deserializeUntyped(result);
        system.debug('lstAllDatalstAllDatalstAllData:: ' + lstAllData);
        for(object obj : lstAllData)
        {
           
            Map<string, Object> mapData = (Map<string, Object>)obj;
           
            Map<string, Object> mapProfile = (Map<string, Object>)mapData.get('profile');
            //strUserOktaID
            WrapUserDetail objWrapUserDetail = new WrapUserDetail((string)mapProfile.get('id'),(string)mapProfile.get('AGNLoginID'), (string)mapProfile.get('firstName'), (string)mapProfile.get('lastName'),
                                                                    (string)mapProfile.get('title'), (string)mapProfile.get('email'), (string)mapProfile.get('employeeID'),
                                                                    (string)mapProfile.get('IDMCPID'), (string)mapProfile.get('manager'), (string)mapProfile.get('IDMCORALLocation'));
           
            lstWrapAllData.add(objWrapUserDetail);
        }
    }
   
    /**
     * @author         Krzysztof Wasniowski <k.wasniowski@polsource.com>
     * @version        1.0
     * @date           12/1/2013
     * @description    Returns list of users maching given filter defintion from OCTA API
     * @param          string filterDefinition Filter definition, f.ex: (userName pr or name.givenName eq Edward)
     * @return         string API response (json string)
     * @throws         EF_OKTA_APIException throws an exception is response is not 200 or filter definition is empty
     */
    public String getUserList(string filterDefinition)
    {
        String result       = '[]';
       
        Http h              = new Http();
        HttpRequest req     = new HttpRequest();
        String queryParams  = '?filter=' + EncodingUtil.urlEncode(filterDefinition.trim(), 'UTF-8');
       
        system.debug('queryParamsqueryParamsqueryParams::::New ' + queryParams);
       
        req.setMethod('GET');
        req.setHeader('Accept', 'application/json');
        //req.setTimeout(timeoutOKTA);
        req.setEndpoint(apiEndpoint + '/users' + queryParams);
        req.setHeader('Authorization', authToken);
       
        system.debug('reqreqreqreq:::New ' + req);
       
        HttpResponse res = h.send(req);
        system.debug('resresresres:::New ' + res);
       
        if (200 == res.getStatusCode()) {
            result = res.getBody();
        }
       
        return result;
    }
   
    public string CreateSearchString()
    {
        string strQueryStringToReturn = '';
       
        if(isUserNameSelected)
        {
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.AGNLoginID co ' + '\'' + strSearchData + '\'';
        }
        if(isFirstNameSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.firstName co ' + '\'' + strSearchData + '\'';
        }
        if(isLastNameSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.lastName co ' + '\'' + strSearchData + '\'';
        }
        if(isEmailSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.email co ' + '\'' + strSearchData + '\'';
        }
        if(isEmployeeIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.employeeID co ' + '\'' + strSearchData + '\'';
        }
        if(isCPIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.IDMCPID co ' + '\'' + strSearchData + '\'';
        }
        if(isManagerIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.managerID co ' + '\'' + strSearchData + '\'';
        }
       
        system.debug('strQueryStringToReturn:::: ' + strQueryStringToReturn);
        return strQueryStringToReturn;
    }
}


Thanks in Advance