I have a trigger on the opportunity that requires at least 3 contact roles to be associated with any opportunity moving to a closed stage. I've created a test class for the trigger but it's not covering the try {} catch {} statements in my class.

The try{} statement should fail and the catch (exception) should be run. Need help troubleshooting.

Trigger:

trigger RequireContactRoles on Opportunity (before insert, before update) {
    
    List<Opportunity> oppsToProcess = new List<Opportunity>();

    // figure out which opportunities have transitioned to meet criteria
    for (Opportunity opp : trigger.new) {
       // check if transitioned to closed/won, otherwise ignore
       if ( (opp.StageName == '5- Closed' || opp.StageName == '6- Win') && ( trigger.oldMap.get(opp.id).StageName != '6- Win' || trigger.oldMap.get(opp.id).StageName != '5- Closed') && (opp.Override_Contact_Req__c = FALSE) ) {
          oppsToProcess.add(opp);
       }
    }

    Map<Id, Integer> ocrCountByOppId = new Map<Id, Integer>();
    
    List<AggregateResult> aggs = [SELECT OpportunityId oppId, count(id) idCount FROM OpportunityContactRole GROUP BY OpportunityId];

    for (AggregateResult ar : aggs) {
        ocrCountByOppId.put((Id) ar.get('oppId'), (Integer) ar.get('idCount'));
    }

    for (Opportunity opp : oppsToProcess) {
       Integer ocrCount = ocrCountByOppId.get(opp.id);
       if (ocrCount == null || ocrCount < 3) {
           opp.addError(' You need at least 3 contact roles to close the opportunity');
        }
    }
}

Test Class:

@isTest(SeeAllData=true)
public class RequireContactRolesTEST {
    
    static testMethod void testContactRole() {

        //create an account
        Account acc = new Account();
        acc.Name = 'Acc-ContactRoles';
        acc.BillingCountry = 'United States';
        insert acc;
		
        //create 2 contacts
        List<Contact> cons = new List<Contact>();
        
        Contact con1 = new Contact();
        con1.FirstName = 'ContactRoles1';
        con1.LastName = 'Surname1';
        con1.AccountId = acc.Id;
        cons.add(con1);
        
        Contact con2 = new Contact();
        con2.FirstName = 'ContactRoles2';
        con2.LastName = 'Surname2';
        con2.AccountId = acc.Id;
        cons.add(con2);
        insert cons;
        
        //create product
		Product2 prod = new Product2();
        prod.Name = 'contact role prod';
        prod.isActive = true;
        insert prod;
        
        //create pricebookentry
        List<Pricebook2> pb = [SELECT Id, Name, IsStandard, IsActive FROM Pricebook2 WHERE IsStandard = true LIMIT 1];
            for (Pricebook2 pricebook : pb) {
                if (!pricebook.isActive) {
                    pricebook.isActive = true;
                }
            }
        
        PricebookEntry pbe = new PricebookEntry();
        pbe.Pricebook2Id = pb[0].id;
        pbe.Product2Id = prod.id;
        pbe.UnitPrice = 400;
        pbe.UseStandardPrice = false;
        pbe.IsActive = true;
        insert pbe;
            
        //create campaign for required opp field
        Campaign cam = new Campaign();
        cam.Name = 'cam - contact role test';
        insert cam;

        //create an opportunity
        Opportunity opp = new Opportunity();
        opp.Name = 'Opp-ContactRoles';
        opp.AccountId = acc.Id;
        opp.StageName = 'S- Suspect';
        opp.Amount = 10000;
        opp.New_Renew__c = 'New';
        opp.Campaign_Source__c = cam.Id;
        opp.CloseDate = System.Today();
        insert opp;
        
        OpportunityLineItem oli = new OpportunityLineItem();
        oli.OpportunityId = opp.id;
        oli.PricebookEntryId = pbe.id;
        oli.Quantity = 1;
        oli.UnitPrice = 250;
        insert oli;
        
        //add 2 contact roles and make 1 the primary
        List<OpportunityContactRole> conRoles = new List<OpportunityContactRole>();
        
        OpportunityContactRole ocr1 = new OpportunityContactRole();
        ocr1.OpportunityId = opp.Id;
        ocr1.ContactId = con1.Id;
        ocr1.Role = 'Buyer';
        ocr1.IsPrimary = TRUE;
        conRoles.add(ocr1);

        OpportunityContactRole ocr2 = new OpportunityContactRole();
        ocr2.OpportunityId = opp.Id;
        ocr2.ContactId = con2.Id;
        ocr2.Role = 'Tester';
        ocr2.IsPrimary = FALSE;
        conRoles.add(ocr2);
        insert conRoles;        
           
        try {
        	Opportunity testOpp = [SELECT Id, Name, Amount, Number_of_Contact_Roles__c FROM Opportunity WHERE Id = :opp.Id];
            testOpp.Override_Contact_Req__c = false;
            testOpp.StageName = '5- Closed';
            System.debug(testOpp);
        	update testOpp;
        } catch (Exception e) {
            System.debug('I\'m in the ERROR message!');
            System.assert(e.getMessage().contains('contact roles'));
        }
        
        pb[0].isActive = false;
    }
}