Hi,

I am unable to deploy my code due to null pointer exception.
Could anyone help me please.
Below is the my controller and test class.

Controller wit the method iam testing

public PageReference saveTOLead()
    {
        showrefreshblck = true;
        shouldRedirect = true;
     
        Lead acc = new Lead(id=a.id);
        
        
        redirectUrl = controller.view().getUrl();
        
        getRatings(acc.Id,allCompDetails[selectedrow].companyId);
        
        
        acc.Company_Registration_Number__c = allCompDetails[selectedrow].RegistrationNumber;
        acc.Company =  allCompDetails[selectedrow].Company;
        acc.is_saved_prev__c = true;
        acc.Company_Id__c = allCompDetails[selectedrow].companyId;
        
        List<String> addrArray = allCompDetails[selectedrow].Address.split(',');
        Map<Integer,String> accMap = new Map<Integer,String>();
        Integer n= addrArray.size();
        for(Integer l=0;l<addrArray.size();l++)
        {
            accMap.put(l, addrArray[l]);
        }
        
        acc.Street = accMap.get(0);  
        
        acc.City =  accMap.get(1);
        acc.State = accMap.get(2); 
        
        acc.PostalCode = allCompDetails[selectedrow].postalCode;
        acc.Company_Status__c =    allCompDetails[selectedrow].status;
        acc.CompanyType__c =allCompDetails[selectedrow].type;
        
     
        
        showPgblck = false;
       return null;
      
    }
    
Test class witht the piece which testes the method

 public static testMethod void testLeadRatings() {
        Test.setMock(HttpCalloutMock.class, new MockHttpResGenFetchLeadDetailsRatings());
        Lead l = new Lead();
        l.FirstName = 'FirstName1';
        l.LastName = 'LastName1';
        l.MobilePhone = '074434567890';
        l.Company = 'Traves1';
       
        insert l;

        test.startTest();

        PageReference pageRef = Page.Lead_DisplayCompany; //FC_VF
        Test.setCurrentPage(pageRef);                    
        pageRef.getParameters().put('id',l.id);
        ApexPages.StandardController sc = new ApexPages.StandardController(l);

        LeadFetchCompanyDetails fc = new LeadFetchCompanyDetails(sc);
        LeadFetchCompanyDetails.CompanyDetails cd = new LeadFetchCompanyDetails.CompanyDetails();
        cd.companyid = 'GB003/0/07375960';
        cd.RegistrationNumber='07375960';
        cd.Address = 'Test.test,test';                
        cd.Company = 'Traves';
        cd.postalCode ='HA02RX';
        cd.Status ='Active';
        cd.Type= 'Ltd';

 
        fc.allCompDetails.add(cd);
        // fc.selectedrow = 0;

        system.assert(fc!=null);
        fc.saveTOLead();
        
        LeadFetchRatingDetails.CompanyDetails lfrd = new LeadFetchRatingDetails.CompanyDetails ();
        LeadFetchRatingDetails.contactWrapper cw = new LeadFetchRatingDetails.contactWrapper();
        test.stopTest();
    }