code: def testGetDiscount(self):
      discounts = self.dlm6._getDiscounts()
      self.assertTrue(0.9 in discounts)
      self.assertTrue(0.8 in discounts)
      self.assertTrue(1.0 in discounts)
  
file_path: pydlm/tests/tuner/test_dlmTune.py
imports: import unittest
  from pydlm.modeler.trends import trend
  from pydlm.modeler.seasonality import seasonality
  from pydlm.modeler.autoReg import autoReg
  from pydlm.tuner._dlmTune import _dlmTune
label_desc: Use image node_id 3 for calling the test_dlmTune obj's underlying member method code with example usage: obj.testGetDiscount() without return types