use std::cmp::Ordering; use git_testtools::hex_to_id; use crate::basic_repo; #[test]fn short_id() -> crate::Result {    let repo = basic_repo()?;    let commit = repo.head_commit()?;    assert_eq!(commit.short_id()?.cmp_oid(&commit.id), Ordering::Equal);    Ok(())} #[test]fn tree() -> crate::Result {    let repo = basic_repo()?;    let commit = repo.head_commit()?;     assert_eq!(commit.tree()?.id, commit.tree_id().expect("id present"));    assert_eq!(        commit.tree_id().ok().map(|id| id.detach()),        Some(hex_to_id("21d3ba9a26b790a4858d67754ae05d04dfce4d0c"))    );    Ok(())} #[test]fn decode() -> crate::Result {    let repo = basic_repo()?;    let commit = repo.head_commit()?;    assert_eq!(commit.decode()?.message, commit.message_raw()?);    assert_eq!(commit.decode()?.message(), commit.message()?);    assert_eq!(commit.decode()?.message, "c2\n");    Ok(())}