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romantic/tests/readme.rs

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Rust
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2022-04-10 14:11:14 +00:00
use romantic::Roman;
#[test]
fn test_readme_roman() {
let roman = Roman::default();
assert_eq!(roman.to_string(2022).unwrap(), "MMXXII");
assert_eq!(roman.from_str::<i32>("MMXXII").unwrap(), 2022);
// The default Roman numeral has a maximum of 3999.
assert!(roman.to_string(4000).is_err());
}
#[test]
fn test_readme_custom() {
// The order of characters in the array determines their value.
// Here, A equals 1 and B equals 5.
let custom = Roman::new(&['A', 'B']);
assert_eq!(custom.to_string(6).unwrap(), "BA");
assert_eq!(custom.from_str::<i32>("BA").unwrap(), 6);
// With only 2 characters, the maximum value you can get is 8
// (the equivalent of VIII). To increase the maximum range, use
// more characters.
assert!(custom.to_string(9).is_err());
}