class UserMailerPreview < ActionMailer::Preview def email_change_confirmation new_email_address = "new.email@example.com" user = User.active.sample token = user.send(:generate_email_address_change_token, to: new_email_address) Current.account = user.account UserMailer.email_change_confirmation( email_address: new_email_address, token: token, user: user ) end end