You test the insert, update, or delete the record that the trigger deals with. For example if your trigger is for an insert (either before or after) of an Account then you write your test class to insert Account records. Both the Handler and the Trigger will be tested by the same code.
You test the insert, update, or delete the record that the trigger deals with. For example if your trigger is for an insert (either before or after) of an Account then you write your test class to insert Account records. Both the Handler and the Trigger will be tested by the same code.
All Answers