Function flush_is_idempotent

nodedb-wal/src/double_write.rs:589–613

()

    #[test]
    fn flush_is_idempotent() {
        let dir = tempfile::tempdir().unwrap();
        let dwb_path = dir.path().join("idem.dwb");

        let mut dwb = open_buffered(&dwb_path);

        dwb.flush().unwrap();
        assert!(!dwb.dirty);

        let record = WalRecord::new(
            RecordType::Put as u32,
            1,
            1,
            0,
            0,
            b"data".to_vec(),
            None,
            None,
        )
        .unwrap();
        dwb.write_record_deferred(&record).unwrap();
        dwb.flush().unwrap();
        dwb.flush().unwrap();
        assert!(!dwb.dirty);
    }

    #[test]
    fn slot_stride_is_o_direct_aligned() {