)
  }

  #[test]
  fn insufficient_padding_to_add_postage_no_utxos() {
    let utxos = vec![(outpoint(1), Amount::from_sat(5_000))];

    pretty_assert_eq!(
      TransactionBuilder::new(
        satpoint(1, 4_950),
        BTreeMap::new(),
        utxos.into_iter().collect(),
        BTreeSet::new(),
        recipient(),
        [change(0), change(1)],
        FeeRate::try_from(1.0).unwrap(),
        Target::Postage,
      )
      .build_transaction(),
      Err(Error::NotEnoughCardinalUtxos),
    )
  }

  #[test]
  fn insufficient_padding_to_add_postage_small_utxos() {
    let utxos = vec![
      (outpoint(1), Amount::from_sat(5_000)),
      (outpoint(2), Amount::from_sat(1)),
    ];

    pretty_assert_eq!(
      TransactionBuilder::new(
        satpoint(1, 4_950),
        BTreeMap::new(),
        utxos.into_iter().collect(),
        BTreeSet::new(),
        recipient(),
        [change(0), change(1)],
        FeeRate::try_from(1.0).unwrap(),
        Target::Postage
      )
      .build_transaction(),
      Err(Error::NotEnoughCardinalUtxos),