def METHOD_NAME(self):
    self.assertTrue(path_is_hardened([H_(44), H_(1), H_(0)]))
    self.assertTrue(path_is_hardened([H_(0)]))
    self.assertFalse(path_is_hardened([44, H_(44), H_(0)]))
    self.assertFalse(path_is_hardened([0]))
    self.assertFalse(path_is_hardened([H_(44), H_(1), H_(0), H_(0), 0]))