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Nikhil Sharma 17Nikhil Sharma 17 

MIXED_DML_OPERATION, Error in TestClass

MIXED_DML_OPERATION, DML operation on setup object is not permitted after you have updated a non-setup object (or vice versa): Account, original object: EmailTemplate: []
Best Answer chosen by Nikhil Sharma 17
sumit singh 37sumit singh 37
2) When doing 'setup-object DML' in your test methods, such as creating test Users or Groups, wrap the DML statements as follows:

User thisUser = [ select Id from User where Id = :UserInfo.getUserId() ];
System.runAs ( thisUser ) {
    ...your setup-object DML...
}