code: def test_factory(self):
      returns = [0.1] * 100
      r_objects = factory.create_returns_from_list(
          returns, self.sim_params
      )
      self.assertLessEqual(
          r_objects.index[-1], pd.Timestamp("2006-12-31", tz="UTC")
      )
  
imports: import datetime
  import pandas
  import numpy
  from zipline.utils import factory
  from zipline.finance.trading import SimulationParameters
  import zipline.testing.fixtures
  from zipline.finance.metrics import _ClassicRiskMetrics
label_desc: Use image node_id 2 for calling the TestRisk obj's underlying member method code with example usage: obj.test_factory() without return types