use crate::repo_rw; mod log {    use git_repository as git;     #[test]    fn message() {        assert_eq!(            git::reference::log::message("commit", "the subject\n\nthe body".into(), 0),            "commit (initial): the subject"        );        assert_eq!(            git::reference::log::message("other", "the subject".into(), 1),            "other: the subject"        );         assert_eq!(            git::reference::log::message("rebase", "the subject".into(), 2),            "rebase (merge): the subject"        );    }}mod find {    use std::convert::TryInto;     use git_ref as refs;    use git_ref::FullNameRef;    use git_testtools::hex_to_id;     fn repo() -> crate::Result<git_repository::Repository> {        crate::repo("make_references_repo.sh").map(Into::into)    }     #[test]    fn and_peel() -> crate::Result {        let repo = repo()?;        let mut packed_tag_ref = repo.try_find_reference("dt1")?.expect("tag to exist");        let expected: &FullNameRef = "refs/tags/dt1".try_into()?;        assert_eq!(packed_tag_ref.name(), expected);         assert_eq!(            packed_tag_ref.inner.target,            refs::Target::Peeled(hex_to_id("4c3f4cce493d7beb45012e478021b5f65295e5a3")),            "it points to a tag object"        );         let object = packed_tag_ref.peel_to_id_in_place()?;        let the_commit = hex_to_id("134385f6d781b7e97062102c6a483440bfda2a03");        assert_eq!(object, the_commit, "it is assumed to be fully peeled");        assert_eq!(            object,            packed_tag_ref.peel_to_id_in_place()?,            "peeling again yields the same object"        );         let mut symbolic_ref = repo.find_reference("multi-link-target1")?;         let expected: &FullNameRef = "refs/heads/multi-link-target1".try_into()?;        assert_eq!(symbolic_ref.name(), expected);        assert_eq!(symbolic_ref.peel_to_id_in_place()?, the_commit);         let expected: &FullNameRef = "refs/remotes/origin/multi-link-target3".try_into()?;        assert_eq!(symbolic_ref.name(), expected, "it follows symbolic refs, too");        assert_eq!(symbolic_ref.into_fully_peeled_id()?, the_commit, "idempotency");        Ok(())    }} #[test]fn set_target_id() {    let (repo, _tmp) = repo_rw("make_basic_repo.sh").unwrap();    let mut head_ref = repo.head_ref().unwrap().expect("present");    let target_id = repo.rev_parse_single(":/c1").unwrap();    let prev_id = head_ref.id();    assert_ne!(prev_id, target_id, "we don't point to the target id yet");    head_ref.set_target_id(target_id, "reflog message").unwrap();    assert_eq!(head_ref.id(), target_id, "the id was set and is observable right away");     head_ref.delete().unwrap();    assert!(head_ref        .set_target_id(prev_id, "fails")        .unwrap_err()        .to_string()        .starts_with("Reference \"refs/heads/main\" was supposed to exist"));} mod remote;