use std::convert::TryFrom; use crate::b;use git_config_value::integer::Suffix;use git_config_value::Integer; #[test]fn from_str_no_suffix() {    assert_eq!(Integer::try_from(b("1")).unwrap(), Integer { value: 1, suffix: None });     assert_eq!(        Integer::try_from(b("-1")).unwrap(),        Integer {            value: -1,            suffix: None        }    );} #[test]fn from_str_with_suffix() {    assert_eq!(        Integer::try_from(b("1k")).unwrap(),        Integer {            value: 1,            suffix: Some(Suffix::Kibi),        }    );     assert_eq!(        Integer::try_from(b("1m")).unwrap(),        Integer {            value: 1,            suffix: Some(Suffix::Mebi),        }    );     assert_eq!(        Integer::try_from(b("1g")).unwrap(),        Integer {            value: 1,            suffix: Some(Suffix::Gibi),        }    );} #[test]fn invalid_from_str() {    assert!(Integer::try_from(b("")).is_err());    assert!(Integer::try_from(b("-")).is_err());    assert!(Integer::try_from(b("k")).is_err());    assert!(Integer::try_from(b("m")).is_err());    assert!(Integer::try_from(b("g")).is_err());    assert!(Integer::try_from(b("123123123123123123123123")).is_err());    assert!(Integer::try_from(b("gg")).is_err());} #[test]fn as_decimal() {    fn decimal(input: &str) -> Option<i64> {        Integer::try_from(b(input)).unwrap().to_decimal()    }     assert_eq!(decimal("12"), Some(12), "works without suffix");    assert_eq!(decimal("13k"), Some(13 * 1024), "works with kilobyte suffix");    assert_eq!(decimal("13K"), Some(13 * 1024), "works with Kilobyte suffix");    assert_eq!(decimal("14m"), Some(14 * 1_048_576), "works with megabyte suffix");    assert_eq!(decimal("14M"), Some(14 * 1_048_576), "works with Megabyte suffix");    assert_eq!(decimal("15g"), Some(15 * 1_073_741_824), "works with gigabyte suffix");    assert_eq!(decimal("15G"), Some(15 * 1_073_741_824), "works with Gigabyte suffix");     assert_eq!(decimal(&format!("{}g", i64::MAX)), None, "overflow results in None");    assert_eq!(decimal(&format!("{}g", i64::MIN)), None, "underflow results in None");}