Function metadata

crates/commitlog/src/segment.rs:812–854

()

    #[test]
    fn metadata() {
        let repo = repo::Memory::unlimited();

        let mut writer = repo::create_segment_writer(&repo, <_>::default(), Commit::DEFAULT_EPOCH, 0).unwrap();
        // Commit 0..2
        writer.commit([(0, [0; 32]), (1, [0; 32])]).unwrap();
        // Commit 2..3
        writer.commit([(2, [1; 32])]).unwrap();
        // Commit 3..5
        writer.commit([(3, [2; 32]), (4, [2; 32])]).unwrap();

        writer.flush().unwrap();

        let reader = repo::open_segment_reader(&repo, DEFAULT_LOG_FORMAT_VERSION, 0).unwrap();
        let Metadata {
            header,
            tx_range,
            size_in_bytes,
            max_epoch,
            max_commit_offset,
            max_commit,
        } = reader.metadata().unwrap();

        assert_eq!(
            (
                header,
                tx_range,
                size_in_bytes,
                max_epoch,
                max_commit_offset,
                max_commit.is_some_and(|meta| meta.tx_range == (3..5))
            ),
            (
                Header::default(),
                0..5,
                // header + 5 txs + 3 commits
                (Header::LEN + (5 * 32) + (3 * Commit::FRAMING_LEN)) as u64,
                Commit::DEFAULT_EPOCH,
                3,
                true
            )
        );
    }

    #[test]
    fn commits() {