use bstr::ByteSlice;use git_object::commit::MessageRef; #[test]fn only_title_no_trailing_newline() {    let msg = MessageRef::from_bytes(b"hello there");    assert_eq!(        msg,        MessageRef {            title: b"hello there".as_bstr(),            body: None        }    );    assert_eq!(msg.summary().as_ref(), "hello there");} #[test]fn title_and_body() {    let msg = MessageRef::from_bytes(b"hello\n\nthere");    assert_eq!(        msg,        MessageRef {            title: b"hello".as_bstr(),            body: Some("there".into())        }    );    assert_eq!(msg.summary().as_ref(), "hello");} #[test]fn title_and_body_inconsistent_newlines() {    let msg = MessageRef::from_bytes(b"hello\n\r\nthere");    assert_eq!(        msg,        MessageRef {            title: b"hello".as_bstr(),            body: Some("there".into())        }    );    assert_eq!(msg.summary().as_ref(), "hello");} #[test]fn only_title_trailing_newline_is_retained() {    let msg = MessageRef::from_bytes(b"hello there\n");    assert_eq!(        msg,        MessageRef {            title: b"hello there\n".as_bstr(),            body: None        }    );    assert_eq!(msg.summary().as_ref(), "hello there");} #[test]fn only_title_trailing_windows_newline_is_retained() {    let msg = MessageRef::from_bytes(b"hello there\r\n");    assert_eq!(        msg,        MessageRef {            title: b"hello there\r\n".as_bstr(),            body: None        }    );    assert_eq!(msg.summary().as_ref(), "hello there");} #[test]fn title_with_whitespace_and_body() {    let msg = MessageRef::from_bytes(b"hello \t \r\n there\nanother line\n\nthe body\n\n");    assert_eq!(msg.summary().as_ref(), "hello  there another line");    assert_eq!(        msg,        MessageRef {            title: b"hello \t \r\n there\nanother line".as_bstr(),            body: Some(b"the body\n\n".as_bstr())        }    );} #[test]fn title_with_more_whitespace_and_body() {    let msg = MessageRef::from_bytes(b"hello \r\r\r\n there\nanother line\n\nthe body\n\n");    assert_eq!(msg.summary().as_ref(), "hello  there another line");    assert_eq!(        msg,        MessageRef {            title: b"hello \r\r\r\n there\nanother line".as_bstr(),            body: Some(b"the body\n\n".as_bstr())        }    );} #[test]fn title_with_whitespace_and_body_windows_lineending() {    let msg = MessageRef::from_bytes(b"hello \r\n \r\n there\nanother line\r\n\r\nthe body\n\r\n");    assert_eq!(msg.summary().as_ref(), "hello   there another line");    assert_eq!(        msg,        MessageRef {            title: b"hello \r\n \r\n there\nanother line".as_bstr(),            body: Some(b"the body\n\r\n".as_bstr())        }    );} #[test]fn title_with_separator_and_empty_body() {    let msg = MessageRef::from_bytes(b"hello\n\n");    assert_eq!(msg.summary().as_ref(), "hello");    assert_eq!(        msg,        MessageRef {            title: b"hello".as_bstr(),            body: None        }    );} #[test]fn title_with_windows_separator_and_empty_body() {    let msg = MessageRef::from_bytes(b"hello\r\n\r\n");    assert_eq!(msg.summary().as_ref(), "hello");    assert_eq!(        msg,        MessageRef {            title: b"hello".as_bstr(),            body: None        }    );} mod body {    use git_object::commit::{        message::{body::TrailerRef, BodyRef},        MessageRef,    };     fn body(input: &str) -> BodyRef<'_> {        BodyRef::from_bytes(input.as_bytes())    }     #[test]    fn created_manually_is_the_same_as_through_message_ref() {        assert_eq!(            MessageRef {                title: "title unused".into(),                body: Some("hello".into()),            }            .body()            .expect("present"),            BodyRef::from_bytes("hello".as_bytes())        )    }     #[test]    fn no_trailer() {        let input = "foo\nbar";        assert_eq!(body(input).as_ref(), input);        assert_eq!(body(input).without_trailer(), input);    }     #[test]    fn no_trailer_after_a_few_paragraphs_empty_last_block() {        let input = "foo\nbar\n\nbar\n\nbaz\n\n";        assert_eq!(body(input).as_ref(), input);    }     #[test]    fn no_trailer_after_a_few_paragraphs_empty_last_block_windows() {        let input = "foo\nbar\n\nbar\n\nbaz\r\n\r\n";        assert_eq!(body(input).as_ref(), input);    }     #[test]    fn no_trailer_after_a_few_paragraphs() {        let input = "foo\nbar\n\nbar\n\nbaz";        assert_eq!(body(input).as_ref(), input);    }     #[test]    fn single_trailer_after_a_few_paragraphs() {        let input = "foo\nbar\n\nbar\n\nbaz\n\ntoken: value";        let body = body(input);        assert_eq!(body.as_ref(), "foo\nbar\n\nbar\n\nbaz");        assert_eq!(            body.trailers().collect::<Vec<_>>(),            vec![TrailerRef {                token: "token".into(),                value: "value".into()            }]        )    }     #[test]    fn two_trailers_with_broken_one_inbetween_after_a_few_paragraphs() {        let input = "foo\nbar\n\nbar\n\nbaz\n\na: b\ncannot parse this\r\nc: d\n";        let body = body(input);        assert_eq!(body.as_ref(), "foo\nbar\n\nbar\n\nbaz");        assert_eq!(            body.trailers().collect::<Vec<_>>(),            vec![                TrailerRef {                    token: "a".into(),                    value: "b".into()                },                TrailerRef {                    token: "c".into(),                    value: "d".into()                }            ]        )    }     #[test]    fn no_trailer_after_a_paragraph_windows() {        let input = "foo\nbar\n\nbar\r\n\r\nbaz";        assert_eq!(body(input).as_ref(), input);    }} mod summary {    use std::borrow::Cow;     use git_actor::{Sign, SignatureRef, Time};    use git_object::{        bstr::{BStr, ByteSlice},        commit::MessageRef,        CommitRef,    };     fn summary(input: &[u8]) -> Cow<'_, BStr> {        let summary = MessageRef::from_bytes(input).summary();        let actor = SignatureRef {            name: "name".into(),            email: "email".into(),            time: Time {                time: 0,                offset: 0,                sign: Sign::Plus,            },        };        assert_eq!(            CommitRef {                tree: "tree".into(),                parents: Default::default(),                author: actor.clone(),                committer: actor,                encoding: None,                message: input.as_bstr(),                extra_headers: vec![]            }            .message_summary(),            summary,            "both versions create the same result"        );        summary    }     #[test]    fn no_newline_yields_the_message_itself() {        let input = b"hello world".as_bstr();        assert_eq!(summary(input), Cow::Borrowed(input));    }     #[test]    fn trailing_newlines_and_whitespace_are_trimmed() {        let input = b"hello world \t\r\n \n";        assert_eq!(summary(input), Cow::Borrowed(b"hello world".as_bstr()));    }     #[test]    fn prefixed_newlines_and_whitespace_are_trimmed() {        let input = b" \t\r\n \nhello world";        assert_eq!(summary(input), Cow::Borrowed(b"hello world".as_bstr()));    }     #[test]    fn whitespace_up_to_a_newline_is_collapsed_into_a_space() {        let input = b" \t\r\n \nhello\r\nworld \t\r\n \n";        assert_eq!(summary(input), Cow::Borrowed(b"hello world".as_bstr()));    }     #[test]    fn whitespace_without_newlines_is_ignored_except_for_leading_and_trailing_whitespace() {        let input = b" \t\r\n \nhello \t \rworld \t\r\n \n";        assert_eq!(summary(input), Cow::Borrowed(b"hello \t \rworld".as_bstr()));    }     #[test]    fn lines_separated_by_double_newlines_are_subjects() {        let input = b" \t\r\n \nhello\t \r\nworld \t\r \nfoo\n\nsomething else we ignore";        assert_eq!(summary(input), Cow::Borrowed(b"hello world foo".as_bstr()));    }}