#[test]
  fn from_str_err() {
    "abc".parse::<Rarity>().unwrap_err();

    "".parse::<Rarity>().unwrap_err();
  }

  #[test]
  fn conversions_with_u8() {
    for &expected in &[
      Rarity::Common,
      Rarity::Uncommon,
      Rarity::Rare,
      Rarity::Epic,
      Rarity::Legendary,
      Rarity::Mythic,
    ] {
      let n: u8 = expected.into();
      let actual = Rarity::try_from(n).unwrap();
      assert_eq!(actual, expected);
    }

    assert_eq!(Rarity::try_from(6), Err(6));
  }
}