Public static void VerifyQuantityOrdered(Product2 originalProduct, Product2 updatedProduct, Integer qtyOrdered) {
       	decimal tot = (originalProduct.Quantity_Ordered__c + qtyOrdered);
        
            system.debug('OldVQ ' + originalProduct.Quantity_Ordered__c);
            system.debug('NewVQ ' + updatedProduct.Quantity_Ordered__c);
            system.debug('QTYVQ ' + qtyOrdered);
        
        system.assertEquals(updatedProduct.Quantity_Ordered__c,tot);     
    }

@isTest
private with sharing class OrderTests {

    @testSetup 
    private static void SetupTestData (){    
    	TestDataFactory.InsertTestData(5);   
    } 

    @isTest
    private static void OrderUpdate_UnitTest (){
        Test.startTest();
    	
        List<Order> OrderList = [select id, name, status from order];

        For (Order ordrec : OrderList) {
            OrderItem oirec = [select id, Pricebookentry.product2Id from orderitem where orderid=:ordrec.id];
			Product2 oldprodrec = [SELECT Family,Id,Name,Quantity_Ordered__c,Quantity_Remaining__c 
                            	FROM Product2 where id =: oirec.Pricebookentry.product2Id  limit 1];
            ordrec.status = constants.ACTIVATED_ORDER_STATUS;
            update ordrec;
            OrderItem oirec1 = [select id, Pricebookentry.product2Id from orderitem where orderid=:ordrec.id];
			Product2 newprodrec = [SELECT Family,Id,Name,Quantity_Ordered__c,Quantity_Remaining__c 
                            	FROM Product2 where id =: oirec1.Pricebookentry.product2Id  limit 1]; 
            system.debug('Old ' + oldprodrec.Quantity_Ordered__c);
            system.debug('New ' + newprodrec.Quantity_Ordered__c);
            system.debug('QTY ' + constants.DEFAULT_ROWS);
            TestDataFactory.VerifyQuantityOrdered(oldprodrec,newprodrec,constants.DEFAULT_ROWS);
        }
        Test.stopTest();          
    }
}

@isTest  (seeAllData=false)
private with sharing class Product2Tests {

    /**
     * @name product2Extension_UnitTest
     * @description UnitTest for product2Extension
    **/
    @isTest
    private static void Product2Extension_UnitTest(){
// Set-up user
        String uniqueUserName = 'standarduser' + DateTime.now().getTime() + '@testorg.com';
        Profile p = [SELECT Id FROM Profile WHERE Name='Standard User'];
        User u = new User(Alias = 'standt', Email='standarduser@testorg.com',
        	EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US',
        	LocaleSidKey='en_US', ProfileId = p.Id, TimeZoneSidKey='America/Los_Angeles', UserName=uniqueUserName);

        System.runAs(u) {
        
// When a user first visits the page, there should be multiple rows displayed on the screen. 
// Assert that the size of the productsToInsert list is equal to the DEFAULT_ROWS constant.
//		Test.StartTest(); 
        	Product2 prod = new Product2(name='Test',isActive=true);
        	ApexPages.StandardController stdc = new ApexPages.StandardController(prod);
        	Product2Extension p2x = new Product2Extension(stdc);        
       		System.assertEquals(Constants.DEFAULT_ROWS, p2x.productsToInsert.size());
//		Test.StopTest();  

// When the Add button is clicked, an additional set of rows should be added, 
// so assert that the size of the productsToInsert ** list is double **DEFAULT_ROWS after the button is clicked once. 
//        Test.StartTest();
        	p2x.addRows();
        	System.assertEquals(Constants.DEFAULT_ROWS * 2, p2x.productsToInsert.size());
//		Test.StopTest();          

// Next, test the Save button. Verify that populated rows are saved and unpopulated rows are not saved. 
// Loop through the rows in the productsToInsert list and populate the values of the first 5 records, 
// and then simulate clicking the Save button. Verify that the button worked by asserting that only 5 products were saved.
		integer x = 0; 
        for (Product2Extension.ProductWrapper PTI : p2x.productsToInsert){
            pti.productrecord.name='TESTPRODUCT ' + x;
            pti.productRecord.IsActive = true;
            pti.productRecord.Initial_Inventory__c = 20;
            pti.productRecord.Family = Constants.PRODUCT_FAMILY[0].getValue();           
            pti.pricebookEntryRecord.UnitPrice = 10;
            
        	x++; if (x==5) {break;}
        }

//        Test.startTest();
        	p2x.save();
//        Test.stopTest();
        List<Product2> createdProducts = [SELECT Id FROM Product2];
        System.assertEquals(5, createdProducts.size());

// plus some more test areas        
        p2x.GetFamilyOptions();
        p2x.GetInventory();

    }
    }
}