public with sharing class CampaignDesignProfileTrigger {
    public void updateAccount(List<Campaign_Design_Profile__c> newProfiles){
        //This procedure will update the Account_Name_Ref__c with the
        //Account Id on the related Opportunity.
        Map<Id, Id> oppAccountIds = new Map<Id, Id>();
        List<Id> oppIds = new List<Id>();

        //Retrieving the Opportunity Ids for the new records
        for(Campaign_Design_Profile__c p : newProfiles){
            oppIds.add(p.Related_Opportunity__c);
        }

        //Populating the oppAccountIds map with the Opp Id/Acct Id for lookup later
        for(Opportunity o : [Select Id, AccountId From Opportunity Where Id in:oppIds]){
            oppAccountIds.put(o.Id, o.AccountId);
        }

        for(Campaign_Design_Profile__c p : newProfiles){
            p.Account_Name_Ref__c = oppAccountIds.get(p.Related_Opportunity__c);
        }
    }

    static testMethod void testCampaignDesignProfileTrigger(){
        test.startTest();
        //Retrieving Record Types
        List<RecordType> rec_type = [Select Id From RecordType
            Where IsActive=true And SobjectType = 'Campaign_Design_Profile__c' Limit 1];
        //Creating a test Account
        Account acct = new Account(Name='CampaignDesignProfileTest Account');
        insert acct;

        //Creating a test Opportunity
        Opportunity opp = new Opportunity(Name='CampaignDesignProfileTest Opportunity', AccountId=acct.Id,
            StageName='Needs Analysis', CloseDate=system.today());
        insert opp;

        //Creating a test Campaign Design Profile
        Campaign_Design_Profile__c cdp = new Campaign_Design_Profile__c(Name='CampaignDesignProfileTest cdp',
            Campaign_Type__c='Account Profiling', Related_Opportunity__c=opp.Id);
            cdp.Estimate_Type__c = 'N/A';
            cdp.Volume__c =14.00;
            cdp.of_Hours__c =15.00;
        insert cdp;

        test.stopTest();
    }
}