mod parse_signature {    use crate::borrowed::util::parse_signature;    use crate::borrowed::Signature;    use crate::ByteSlice;    use crate::{Sign, Time};     fn signature(name: &'static str, email: &'static str, time: u32, sign: Sign, offset: i32) -> Signature<'static> {        Signature {            name: name.as_bytes().as_bstr(),            email: email.as_bytes().as_bstr(),            time: Time { time, offset, sign },        }    }     #[test]    fn tz_minus() {        assert_eq!(            parse_signature(b"Sebastian Thiel <byronimo@gmail.com> 1528473343 -0230")                .unwrap()                .1,            signature("Sebastian Thiel", "byronimo@gmail.com", 1528473343, Sign::Minus, -9000)        );    }     #[test]    fn tz_plus() {        assert_eq!(            parse_signature(b"Sebastian Thiel <byronimo@gmail.com> 1528473343 +0230")                .unwrap()                .1,            signature("Sebastian Thiel", "byronimo@gmail.com", 1528473343, Sign::Plus, 9000)        );    }     #[test]    fn negative_offset_0000() {        assert_eq!(            parse_signature(b"Sebastian Thiel <byronimo@gmail.com> 1528473343 -0000")                .unwrap()                .1,            signature("Sebastian Thiel", "byronimo@gmail.com", 1528473343, Sign::Minus, 0)        );    }     #[test]    fn empty_name_and_email() {        assert_eq!(            parse_signature(b" <> 12345 -1215").unwrap().1,            signature("", "", 12345, Sign::Minus, -44100)        );    }}