HI,

I have this class

public class OpportunityContactRoleController {
    
    public Id contRoleId {get; set;}
    public Id oppId;
    public Opportunity oppObj;
    public ApexPages.StandardController controller {get; set;}
    

    public List<OpportunityContactRole> oppContRoles {get; set;}
    
    public OpportunityContactRoleController(ApexPages.StandardController controller){
        this.oppObj = (Opportunity)controller.getRecord();
        oppId = this.oppObj.Id;
        
        oppContRoles = [SELECT Id,OpportunityId, Contact.Name, Contact.Email, Role, Contact.Account.Name, Contact.Phone, IsPrimary
                            FROM OpportunityContactRole WHERE OpportunityId = :((Opportunity)controller.getRecord()).Id];
        
    }
    
    public void deleteOppContRole(){
        if(contRoleId != null){
        OpportunityContactRole ocr = new OpportunityContactRole();
        ocr.Id = contRoleId;
        delete ocr;
        oppContRoles = new List<OpportunityContactRole>();
        
        oppContRoles = [SELECT Id,OpportunityId, Contact.Name, Contact.Email, Role, Contact.Account.Name, Contact.Phone, IsPrimary
                            FROM OpportunityContactRole WHERE OpportunityId = :((Opportunity)controller.getRecord()).Id];
        }
        
    }
    
   public pageReference primaryContact() {
     
       PageReference pageRef = Page.OpportunityPrimaryContact;
       pageRef.getParameters().put('Id', oppId);
       pageRef.setRedirect(true);
       
       return pageRef;
   }
    
}



Test Class :


@isTest
public class OpportunityContactRoleController_Test {
    
    private static testMethod void testData(){
        
 
        Account testAccount = new Account(Name = 'Test Account', Country__c = 'Denmark');
        insert testAccount;
        
     
        Contact testContact = new Contact(LastName = 'Test LastName', FirstName = 'Test LastName');
        insert testContact;
        

        Opportunity testOpportunity = new Opportunity(AccountId = testAccount.Id, Name = 'Test Opportunity', Country__c = 'Denmark', 
                                                      
                                                      CurrencyIsoCode = 'USD', StageName = 'Loan Current', CloseDate = date.today(), Days_In_Term__c = 2 );
        insert testOpportunity;
        

        OpportunityContactRoleController controller = new OpportunityContactRoleController(new ApexPages.StandardController(testOpportunity));
  
        controller.primaryContact();

        OpportunityContactRole ocr = new OpportunityContactRole(OpportunityId = testOpportunity.Id, ContactId = testContact.Id );
        insert ocr;
        
       
        controller.contRoleId = ocr.Id;
        controller.deleteOppContRole();
        
}
}



when I run the test class it fails and returns like this.


Class.OpportunityContactRoleController.deleteOppContRole: line 30, column 1
Class.OpportunityContactRoleController_Test.testData: line 33, column 1

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


Any Idea which returns a Null?

Apologies Still a newbiew in this