code: def test_never_cancel(self):
      cancel_policy = NeverCancel()
      self.assertFalse(cancel_policy.should_cancel(SESSION_END))
      self.assertFalse(cancel_policy.should_cancel(BAR))
  
imports: from unittest import TestCase
  from zipline.finance.cancel_policy import NeverCancel, EODCancel
  from zipline.gens.sim_engine import BAR, SESSION_END
label_desc: Use image node_id 2 for calling the CancelPolicyTestCase obj's underlying member method code with example usage: obj.test_never_cancel() without return types