mod from_bytes {    use crate::borrowed::fixture_bytes;    use git_object::{        borrowed,        borrowed::{tree::Entry, Tree},        bstr::ByteSlice,        tree,    };    use hex::FromHex;     pub fn hex_to_id(hex: &str) -> [u8; 20] {        <[u8; 20]>::from_hex(hex).expect("40 bytes hex sha")    }     pub fn as_id(id: &[u8; 20]) -> borrowed::Id {        id.into()    }     #[test]    fn everything() -> Result<(), Box<dyn std::error::Error>> {        assert_eq!(            Tree::from_bytes(&fixture_bytes("tree", "everything.tree"))?,            Tree {                entries: vec![                    Entry {                        mode: tree::Mode::BlobExecutable,                        filename: b"exe".as_bstr(),                        oid: as_id(&hex_to_id("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"))                    },                    Entry {                        mode: tree::Mode::Blob,                        filename: b"file".as_bstr(),                        oid: as_id(&hex_to_id("e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"))                    },                    Entry {                        mode: tree::Mode::Commit,                        filename: b"grit-submodule".as_bstr(),                        oid: as_id(&hex_to_id("b2d1b5d684bdfda5f922b466cc13d4ce2d635cf8"))                    },                    Entry {                        mode: tree::Mode::Tree,                        filename: b"subdir".as_bstr(),                        oid: as_id(&hex_to_id("4d5fcadc293a348e88f777dc0920f11e7d71441c"))                    },                    Entry {                        mode: tree::Mode::Link,                        filename: b"symlink".as_bstr(),                        oid: as_id(&hex_to_id("1a010b1c0f081b2e8901d55307a15c29ff30af0e"))                    }                ]            }        );        Ok(())    }     #[test]    fn maybe_special() -> Result<(), Box<dyn std::error::Error>> {        assert_eq!(            Tree::from_bytes(&fixture_bytes("tree", "maybe-special.tree"))?                .entries                .len(),            160        );        Ok(())    }     #[test]    fn definitely_special() -> Result<(), Box<dyn std::error::Error>> {        assert_eq!(            Tree::from_bytes(&fixture_bytes("tree", "definitely-special.tree"))?                .entries                .len(),            19        );        Ok(())    }}