Hello Guys

I am having a similar issue, trying to test a very simple Trigger.

Basically my trigger will kick in when a new contact is inserted, and what it will do is to update the account name associated to the contact.

I created a Class, a Trigger and a TestClass that I am using to test that all works fine:

Class:

// This class updates the Organization Name for every New Contact created

public class UpdateOrganizationNameClass {

   public static void UpdateOrganizationName(Contact[] cont){

      Contact c = [select account.name from contact where id = :cont[0].id];
      c.account.name='test organization';
      update c.account;
   }
}

Trigger:

trigger NewContactUpdateOrganizationName on Contact (after insert) {

UpdateOrganizationNameClass.UpdateOrganizationName(Trigger.new);

}

Test Class:

// This is a TEST class created to test the UpdateOrganizationNameClass code

public class UpdateOrganizationNameClassTEST {

   static testMethod void testUpdateOrganizationName(){
         
          Contact c = new Contact (lastname = 'Test Contact', firstname = 'Test Contact', start_date__c = System.today());
          insert c;
   }
}

But this is the error message I get:

System.DmlException: Insert failed. First exception on row 0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, NewContactUpdateOrganizationName: execution of AfterInsert

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

Class.UpdateOrganizationNameClass.UpdateOrganizationName: line 8, column 7
Trigger.NewContactUpdateOrganizationName: line 3, column 1

Would you be able to tell me what am I doing wrong?

Thanks

Giorgio