Mixed DML Operations in Test Methods

Test methods allow for performing mixed DML operations between the sObjects listed in sObjects That Cannot Be Used

Together in DML Operations and other sObjects if the code that performs the DML operations is enclosed within

System.runAs method blocks. This enables you, for example, to create a user with a role and other sObjects in the same

test.

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Hi All,

Here is the syntax to avoid test class errors in Mixed DML Operation salesforce,

@isTest

public class MyTest

{

  Public static testmethod void Test_MyTest()

   {

      User thisUser = [SELECT Id FROM User WHERE Id = :UserInfo.getUserId()];

      System.runAs (thisUser) 

      {

      

    // Add your test class content here

     }

   }

}

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Example:

@isTest

private class RunasTest {

static testMethod void mixeddmltest() {

// Create the account and group.

Account ac = new Account(Name='TEST ACCOUNT');

// Group is created in the insert trigger.

insert ac;

// Set up user

User u1 = [SELECT Id FROM User WHERE UserName='testadmin@acme.com'];

System.RunAs(u1){

// Add startTest and stopTest to avoid mixed DML error

Test.startTest();