mod write_to {    mod invalid {        use git_actor::{Sign, Signature, Time};         #[test]        fn name() {            let signature = Signature {                name: "invalid < middlename".into(),                email: "ok".into(),                time: default_time(),            };            assert_eq!(                format!("{:?}", signature.write_to(Vec::new())),                "Err(Custom { kind: Other, error: IllegalCharacter })"            );        }         #[test]        fn email() {            let signature = Signature {                name: "ok".into(),                email: "server>.example.com".into(),                time: default_time(),            };            assert_eq!(                format!("{:?}", signature.write_to(Vec::new())),                "Err(Custom { kind: Other, error: IllegalCharacter })"            );        }         #[test]        fn name_with_newline() {            let signature = Signature {                name: "hello\nnewline".into(),                email: "name@example.com".into(),                time: default_time(),            };            assert_eq!(                format!("{:?}", signature.write_to(Vec::new())),                "Err(Custom { kind: Other, error: IllegalCharacter })"            );        }         fn default_time() -> Time {            Time {                time: 0,                offset: 0,                sign: Sign::Plus,            }        }    }} use bstr::ByteSlice;use git_actor::Signature; #[test]fn round_trip() -> Result<(), Box<dyn std::error::Error>> {    for input in &[        &b"Sebastian Thiel <byronimo@gmail.com> 1 -0030"[..],        ".. ☺️Sebastian 王知明 Thiel🙌 .. <byronimo@gmail.com> 1528473343 +0230".as_bytes(),        ".. whitespace  \t  is explicitly allowed    - unicode aware trimming must be done elsewhere <byronimo@gmail.com> 1528473343 +0230".as_bytes(),    ] {        let signature: Signature = git_actor::SignatureRef::from_bytes::<()>(input)?.into();        let mut output = Vec::new();        signature.write_to(&mut output)?;        assert_eq!(output.as_bstr(), input.as_bstr());    }    Ok(())}