text: from bitcoin_coin_selection.selection_types.coin_selection_params import CoinSelectionParams
  
  
  class TestParams(CoinSelectionParams):
      def __init__(self, utxo_pool, target_value, cost_of_change = None):
          super().__init__(
            utxo_pool,
            target_value,
            short_term_fee_per_byte=0,
            long_term_fee_per_byte=0,
            change_output_size_in_bytes=0,
            change_spend_size_in_bytes=0,
            not_input_size_in_bytes=0
          )
          self._cost_of_change = cost_of_change
  
      @property
      def cost_of_change(self):
        if self._cost_of_change:
          return self._cost_of_change
        return super().cost_of_change
  