#[test]
  fn n() {
    assert_eq!(Height(0).n(), 0);
    assert_eq!(Height(1).n(), 1);
  }

  #[test]
  fn add() {
    assert_eq!(Height(0) + 1, 1);
    assert_eq!(Height(1) + 100, 101);
  }

  #[test]
  fn sub() {
    assert_eq!(Height(1) - 1, 0);
    assert_eq!(Height(100) - 50, 50);
  }

  #[test]
  fn eq() {
    assert_eq!(Height(0), 0);
    assert_eq!(Height(100), 100);
  }

  #[test]
  fn from_str() {
    assert_eq!("0".parse::<Height>().unwrap(), 0);
    assert!("foo".parse::<Height>().is_err());
  }

  #[test]
  fn subsidy() {
    assert_eq!(Height(0).subsidy(), 5000000000);
    assert_eq!(Height(1).subsidy(), 5000000000);
    assert_eq!(Height(SUBSIDY_HALVING_INTERVAL - 1).subsidy(), 5000000000);
    assert_eq!(Height(SUBSIDY_HALVING_INTERVAL).subsidy(), 2500000000);
    assert_eq!(Height(SUBSIDY_HALVING_INTERVAL + 1).subsidy(), 2500000000);
  }

  #[test]
  fn starting_sat() {
    assert_eq!(Height(0).starting_sat(), 0);
    assert_eq!(Height(1).starting_sat(), 5000000000);
    assert_eq!(
      Height(SUBSIDY_HALVING_INTERVAL - 1).starting_sat(),