use bstr::ByteSlice;use git_date::{time::Sign, Time}; #[test]fn is_set() {    assert!(!Time::default().is_set());    assert!(Time {        seconds_since_unix_epoch: 1,        ..Default::default()    }    .is_set());} #[test]fn write_to() -> Result<(), Box<dyn std::error::Error>> {    for (time, expected) in &[        (            Time {                seconds_since_unix_epoch: 500,                offset_in_seconds: 9000,                sign: Sign::Plus,            },            "500 +0230",        ),        (            Time {                seconds_since_unix_epoch: 189009009,                offset_in_seconds: 36000,                sign: Sign::Minus,            },            "189009009 -1000",        ),        (            Time {                seconds_since_unix_epoch: 0,                offset_in_seconds: 0,                sign: Sign::Minus,            },            "0 -0000",        ),    ] {        let mut output = Vec::new();        time.write_to(&mut output)?;        assert_eq!(output.as_bstr(), expected);    }    Ok(())}