code: def test_security_add(self):
      def get_datetime():
          return pd.Timestamp("2015-01-27", tz="UTC")
  
      with security_list_copy():
          add_security_data(["AAPL", "GOOG"], [])
          rl = SecurityListSet(get_datetime, self.asset_finder)
          should_exist = [
              asset.sid
              for asset in [
                  self.asset_finder.lookup_symbol(
                      symbol, as_of_date=self.extra_knowledge_date
                  )
                  for symbol in ["AAPL", "GOOG", "BZQ", "URTY"]
              ]
          ]
          for sid in should_exist:
              self.assertIn(
                  sid,
                  rl.leveraged_etf_list.current_securities(
                      get_datetime()
                  ),
              )
  
imports: from datetime import timedelta
  import pandas
  from nose_parameterized import parameterized
  from zipline.algorithm import TradingAlgorithm
  from zipline.errors import TradingControlViolation
  from zipline.testing import add_security_data, security_list_copy
  from zipline.testing.fixtures import WithMakeAlgo, ZiplineTestCase
  from zipline.utils import factory
  from zipline.utils.security_list import SecurityListSet, load_from_directory
label_desc: Use image node_id 3 for calling the SecurityListTestCase obj's underlying member method code with example usage: obj.test_security_add() and returns: pd