code: def _test_get_spot_value_backtest(self):
      asset_finder = self.data_portal_backtest.asset_finder
  
      assets = [
          asset_finder.lookup_symbol("neo_btc", self.bitfinex),
      ]
  
      date = pd.to_datetime("2017-09-10", utc=True)
      value = self.data_portal_backtest.get_spot_value(
          assets, "close", date, "minute"
      )
      log.info("found spot value {}".format(value))
      pass
  
file_path: catalyst/tests/exchange/test_data_portal.py
imports: import pandas
  from logbook import Logger
  from catalyst import get_calendar
  from catalyst.exchange.exchange_asset_finder import ExchangeAssetFinder
  from catalyst.exchange.exchange_data_portal import DataPortalExchangeBacktest, DataPortalExchangeLive
  from catalyst.exchange.utils.factory import get_exchanges
label_desc: Use image node_id 5 for calling the TestExchangeDataPortal obj's underlying member method code with example usage: obj._test_get_spot_value_backtest() without return types