Hello I am just trying to write a test class for the portal users

  profileName=[select IsPortalEnabled,Profile.Name from User]; 
                 if(profileName[0].IsPortalEnabled==true){

  // some code
                        }       

               else{

// some code

             }

my test code is.................................................................................

/*enum PortalType { CSPLiteUser, PowerPartner, PowerCustomerSuccess, CustomerSuccess }
   
    static testmethod void usertest() {
        User pu = getPortalUser(PortalType.PowerCustomerSuccess, null, true);
        System.assert([select isPortalEnabled
                         from user
                        where id = :pu.id].isPortalEnabled,
                      'User was not flagged as portal enabled.');      
       
        System.RunAs(pu) {
            System.assert([select isPortalEnabled
                             from user
                            where id = :UserInfo.getUserId()].isPortalEnabled,
                          'User wasnt portal enabled within the runas block. ');
        }
    }
   
    public static User getPortalUser(PortalType portalType, User userWithRole, Boolean doInsert) {
   
        /* Make sure the running user has a role otherwise an exception
           will be thrown. */
    /*    if(userWithRole == null) {  
           
            if(UserInfo.getUserRoleId() == null) {

                UserRole r = new UserRole(name = 'TEST ROLE');
                Database.insert(r);
               
                userWithRole = new User(alias = 'hasrole', email='userwithrole@roletest1.com', userroleid = r.id,
                                    emailencodingkey='UTF-8', lastname='Testing', languagelocalekey='en_US',
                                    localesidkey='en_US', profileid = UserInfo.getProfileId(),
                                    timezonesidkey='America/Los_Angeles', username='userwithrole@testorg.com');
            } else {
                userWithRole = new User(Id = UserInfo.getUserId(), UserRoleId = UserInfo.getUserRoleId());
            }
           
            System.assert(userWithRole.userRoleId != null,
                          'This test requires the target org to have at least one UserRole created. Please create a user role in this organization and try again.');
        }

        Account a;
        Contact c;
        System.runAs(userWithRole) {

                  userWithRole.IsPortalEnabled = true;
                  update userWithRole;
            a = new Account(name = 'TEST ACCOUNT');
            Database.insert(a);
             a.IsPartner = true;
             update a;
            
            c = new Contact(AccountId = a.id, lastname = 'lastname');
            Database.insert(c);
           
       
            mainSSID= new Sold_Service__c(
            CRM_Account__c=a.id,
            SSID__c='22224',
            Name='Test_mayank_IPA',
            CRM_Product_Category__c='VPN & Ethernet',
            CRM_Product_Name__c='Ethernet over SDH'
            );
            insert mainSSID;
       
            mainCase = new Case(
            SSID__c=mainSSID.id,
            accountId = a.id,
            contactId = c.id,
            Parent_Account__c=a.id,
            Type='Incident',
            OPC__c='2222'
            );
            insert mainCase;
          
 
        }
       
        /* Get any profile for the given type.*/
    /*    Profile p = [select id
                      from profile
                     where usertype =:portalType.name()
                     limit 1];  
       
        String testemail = 'puser000@amamama.com';
        User pu = new User(profileId = p.id, username = testemail, email = testemail,
                           emailencodingkey = 'UTF-8', localesidkey = 'en_US',
                           languagelocalekey = 'en_US', timezonesidkey = 'America/Los_Angeles',
                           alias='cspu', lastname='lastname', contactId = c.id);
       
        if(doInsert) {
            Database.insert(pu);
        }
          return pu;
    }

private static testmethod void incidentSsidPortalTest(){
        Test.startTest();
        usertest();
        controller = new TT_Case_NewButtonVFC_Ext(new ApexPages.StandardController(mainCase));
        PageReference pr = controller.goToCaseEditPage();
        Test.stopTest();
    }

But still its checking only else loop..means profile is not getting enabled for postal user

Plz help for this