@isTest
public Class OptyLineItem_Test{
     private static testMethod void testMethod1(){
        
		Id pricebookId = Test.getStandardPricebookId();
		
		//Insert product
        Product2 prod = new Product2();
        prod.name = 'TestProduct';
        prod.IsActive = true;
        insert prod;
        
		//PricebookEntry
		PricebookEntry pbe = new PricebookEntry();
		pbe.Product2Id = prod.Id;
		pbe.pricebook2Id= pricebookId;
		pbe.UnitPrice = 10;
		pbe.IsActive = true;
		insert pbe;
		
        //Insert Account
        Account acc = new Account();
        acc.name = 'TestAccount';
        insert acc;
        
        //Opportunity
        Opportunity opty = new Opportunity();
        opty.Name = 'TestOpty01';
        opty.AccountId = acc.Id;
		opty.StageName = 'Prospect';
		opty.CloseDate = System.today();
        insert opty;
        
        //optyLineItem
        OpportunityLineItem oli = new OpportunityLineItem();
        oli.pricebookEntryId = pbe.Id;
        oli.OpportunityId = opty.Id;
		oli.Quantity = 10;
		oli.TotalPrice =200;
        insert oli;
		
		opportunitylineitem ooli = [Select Account_Name__c from opportunitylineitem where id =: oli.id ];
        System.debug('accName: '+acc.Name+ 'AccountNameFormulaOnOLI : '+ooli.Account_Name__c);
        //System.assertEquals(acc.name, ooli.Account_Name__c);
    }
}