You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: week3_day5.rs
    path of file: ./repos/mini-lsm/mini-lsm-mvcc/src/tests
    
    the code of the file until where you have to start completion: use std::ops::Bound;

use bytes::Bytes;
use tempfile::tempdir;

use crate::{
    compact::CompactionOptions,
    lsm_storage::{LsmStorageOptions, MiniLsm},
    tests::harness::check_lsm_iter_result_by_key,
};

#[test]
fn test_txn_integration() {
    let dir = tempdir().unwrap();
    let options = LsmStorageOptions::default_for_week2_test(CompactionOptions::NoCompaction);
    let storage = MiniLsm::open(&dir, options.clone()).unwrap();
    let txn1 = storage.new_txn().unwrap();
    let txn2 = storage.new_txn().unwrap();
    txn1.put(b"test1", b"233");
    txn2.put(b"test2", b"233");
    check_lsm_iter_result_by_key(
        &mut txn1.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![(Bytes::from("test1"), Bytes::from("233"))],
    );
    check_lsm_iter_result_by_key(
        &mut txn2.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![(Bytes::from("test2"), Bytes::from("233"))],
    );
    let
    
fn test_txn_integration() {
    let dir = tempdir().unwrap();
    let options = LsmStorageOptions::default_for_week2_test(CompactionOptions::NoCompaction);
    let storage = MiniLsm::open(&dir, options.clone()).unwrap();
    let txn1 = storage.new_txn().unwrap();
    let txn2 = storage.new_txn().unwrap();
    txn1.put(b"test1", b"233");
    txn2.put(b"test2", b"233");
    check_lsm_iter_result_by_key(
        &mut txn1.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![(Bytes::from("test1"), Bytes::from("233"))],
    );
    check_lsm_iter_result_by_key(
        &mut txn2.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![(Bytes::from("test2"), Bytes::from("233"))],
    );
    let txn3 = storage.new_txn().unwrap();
    check_lsm_iter_result_by_key(
        &mut txn3.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![],
    );
    txn1.commit().unwrap();
    txn2.commit().unwrap();
    check_lsm_iter_result_by_key(
        &mut txn3.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![],
    );
    drop(txn3);
    check_lsm_iter_result_by_key(
        &mut storage.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![
            (Bytes::from("test1"), Bytes::from("233")),
            (Bytes::from("test2"), Bytes::from("233")),
        ],
    );
    let txn4 = storage.new_txn().unwrap();
    assert_eq!(txn4.get(b"test1").unwrap(), Some(Bytes::from("233")));
    assert_eq!(txn4.get(b"test2").unwrap(), Some(Bytes::from("233")));
    check_lsm_iter_result_by_key(
        &mut txn4.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![
            (Bytes::from("test1"), Bytes::from("233")),
            (Bytes::from("test2"), Bytes::from("233")),
        ],
    );
    txn4.put(b"test2", b"2333");
    assert_eq!(txn4.get(b"test1").unwrap(), Some(Bytes::from("233")));
    assert_eq!(txn4.get(b"test2").unwrap(), Some(Bytes::from("2333")));
    check_lsm_iter_result_by_key(
        &mut txn4.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![
            (Bytes::from("test1"), Bytes::from("233")),
            (Bytes::from("test2"), Bytes::from("2333")),
        ],
    );
    txn4.delete(b"test2");
    assert_eq!(txn4.get(b"test1").unwrap(), Some(Bytes::from("233")));
    assert_eq!(txn4.get(b"test2").unwrap(), None);
    check_lsm_iter_result_by_key(
        &mut txn4.scan(Bound::Unbounded, Bound::Unbounded).unwrap(),
        vec![(Bytes::from("test1"), Bytes::from("233"))],
    );
}