def METHOD_NAME(self):
    self.dps[ACTION_DP] = "closing"
    self.dps[CURRENTPOS_DP] = 0
    self.assertFalse(self.subject.is_closing)
    self.dps[CURRENTPOS_DP] = 50
    self.assertTrue(self.subject.is_closing)
    self.dps[ACTION_DP] = "opening"
    self.assertFalse(self.subject.is_closing)
    self.dps[ACTION_DP] = "closing"
    self.dps[CURRENTPOS_DP] = None
    self.assertFalse(self.subject.is_closing)