mod bare {    #[test]    fn init_into_empty_directory_creates_a_dot_git_dir() {        let tmp = tempfile::tempdir().unwrap();        let repo = git_repository::init_bare(tmp.path()).unwrap();        assert_eq!(repo.kind(), git_repository::Kind::Bare);        assert!(            repo.work_dir().is_none(),            "a worktree isn't present in bare repositories"        );        assert_eq!(            repo.git_dir(),            tmp.path(),            "the repository is placed into the directory itself"        );        assert_eq!(git_repository::open(repo.git_dir()).unwrap(), repo);    }     #[test]    fn init_into_non_empty_directory_is_not_allowed() {        let tmp = tempfile::tempdir().unwrap();        std::fs::write(tmp.path().join("existing.txt"), b"I was here before you").unwrap();         assert!(git_repository::init_bare(tmp.path())            .unwrap_err()            .to_string()            .starts_with("Refusing to initialize the non-empty directory as"),);    }} mod non_bare {    #[test]    fn init_into_empty_directory_creates_a_dot_git_dir() -> crate::Result {        let tmp = tempfile::tempdir()?;        let repo = git_repository::init(tmp.path())?;        assert_eq!(repo.kind(), git_repository::Kind::WorkTree { is_linked: false });        assert_eq!(repo.work_dir(), Some(tmp.path()), "there is a work tree by default");        assert_eq!(            repo.git_dir(),            tmp.path().join(".git"),            "there is a work tree by default"        );        assert_eq!(git_repository::open(repo.git_dir())?, repo);        assert_eq!(            git_repository::open(repo.work_dir().as_ref().expect("non-bare repo"))?,            repo        );        Ok(())    }     #[test]    fn init_into_non_empty_directory_is_allowed() -> crate::Result {        let tmp = tempfile::tempdir()?;        std::fs::write(tmp.path().join("existing.txt"), b"I was here before you")?;         git_repository::init(tmp.path())?;        Ok(())    }}