mjhjmtu

When testing, how will @testSetup be preferable than a DataFactory ??
I understand how both works, but I don't see any case where I'd rather use the @testSetup annotation.

I use this datafactory and it works very well...

Thanks.

A major reason to use @TestSetup is the situation where you have many tests that require the same baseline of data. The @TestSetup method runs once and all its data is available to all the test methods in the class. Any changes made by a test method are rolled back but the @TestSetup data isn't. The benefit is faster test running because the baseline data inserts are only done once per test class not once per test method.

A downside is that the only way to get references to the data created in @TestSetup is to query for it. But those queries are much cheaper than the inserts.

I use @TestSetup sometimes, and other times, when I want to refer to the test data in the following asserts, use builder classes invoked from each test method so I have references to the test objects without having to do queries.

You can choose to use whatever technique you like to create the SObjects and use that method inside the @TestStup method or outside of it.

Some more information on @TestSetup: What are the advantage of the @testSetUp annotation.

I use both. Why would you have to choose one over the other? @testSetup is a way to reduce test execution time by reusing the data created once in all the test methods of a test class.

TestFactory is to reuse same data in multiple test classes.

Ex:

@isTest
private class AvinashTest 
 @testSetup
 static void testSetup() 
 Test.startTest();
 Account a = (Account) TestFactory.createSObject(new Account(), true);
 a.Oracle_Cust_Number__c = '10';
 update a;
 Brand__c b = (Brand__c) TestFactory.createSObject(new Brand__c(), true);
 example_Product__c rocProd = TestDataFactory.getexampleProduct( 'Test Prod', b );
 insert rocProd;
 Contact c = (Contact) TestFactory.createSObject(new Contact(), true);
 Opportunity o = (Opportunity) TestFactory.createSObject(new Opportunity(AccountId=a.Id,StageName='Closed Lost', Channel_Type__c = 'Direct'), true);
 Product2 prod1 = (Product2) TestFactory.createSObject(new Product2(Brand__c=b.Id), true);
 prod1.example_Product__c = rocProd.Id;

 update new User(Service_Provider__c = true, Id = UserInfo.getUserId()); 
 Test.stopTest();