overwrite.rs

    fn test_overwrite_entries() {
        solana_logger::setup();
        let ledger_path = get_tmp_ledger_path!();
        {
            let ticks_per_slot = 10;
            let num_ticks = 2;
            let ledger = Blocktree::open_config(&ledger_path, ticks_per_slot).unwrap();

            let mut ticks = create_ticks(num_ticks * 2, Hash::default());
            let ticks2 = ticks.split_off(num_ticks as usize);
            ledger.write_entries(0, 0, 0, &ticks).unwrap();
            ledger.write_entries(0, 0, 0, &ticks2).unwrap(); // <--- BAD.  This does nothing

            let ledger_ticks = ledger.get_slot_entries(0, 0, None).unwrap();

            assert_eq!(ledger_ticks.len(), ticks.len());
            assert_eq!(ledger_ticks, ticks);  // <--- BAD. The second `write_entries()` did nothing

            // assert_eq!(ledger_ticks.len(), ticks2.len());
            // assert_eq!(ledger_ticks, ticks2);  
        }
        Blocktree::destroy(&ledger_path).unwrap();
    }