Hi,

can someone help me in creating a good test class.....

this is my working trigger:

trigger Postalcodelookup on Account (before insert, before update) {
    List<String> Postalcodes4dig = new List<String>(); 
    
    for (Account a:Trigger.new){
        Postalcodes4dig.add(a.Postalcode_4dig__c);
    }

    List <Postalcode__c> PostalCodeList = [Select ID, Name from Postalcode__c where Name in :Postalcodes4dig];

    for (Integer i = 0; i <Trigger.new.size(); i++){
        if (PostalCodeList.size() > 0 && Trigger.new[i].Postalcode_4dig__c !=null){
                        for (Postalcode__c z:PostalCodeList){
                if (Trigger.new[i].Postalcode_4dig__c == z.name){
                        Trigger.new[i].PostalcodeLookup__c = z.ID;
                                }
                        }
        }
        else{
        Trigger.new[i].PostalcodeLookup__c = null;
        }
        
    }
}

And I start my test with the following:

@isTest
// test for the 'Postalcodelookup'trigger
private class Postalcodelookup {
static testMethod void test() {

        account[] Accounttest = new account[]{
         new account(Name='TEST', Shippingstreet = 'Street 10', Shippingpostalcode = '1100 AA', Shippingcity = 'Stad', Shippingcountry = 'Nederland', Phone = '077-5401111',Type = 'Prospect', Potential_amount__c = 1000000,Industry = 'Hospitality', Sub_Industry__c = 'Cultuur', Business_Unit__c = 'Zuid', Account_stage__c = 'Suspect'),
         new account(Name='TEST', Shippingstreet = 'Street 10', Shippingpostalcode = '1000 CD', Shippingcity = 'Stad', Shippingcountry = 'Nederland', Phone = '077-5401111',Type = 'Prospect', Potential_amount__c = 1000000,Industry = 'Hospitality', Sub_Industry__c = 'Cultuur', Business_Unit__c = 'Zuid', Account_stage__c = 'Suspect')
         };

But I don't know how to make it complete with system.assert etc....

Can someone please help :)

thanks