fn test_db_impl_open_close_reopen()

in common/rusty_leveldb_sgx/src/db_impl.rs [1680:1723]

• 36 lines of code
• 1 McCabe index (conditional complexity)

    fn test_db_impl_open_close_reopen() {
        let opt;
        {
            let mut db = build_db().0;
            opt = db.opt.clone();
            db.put(b"xx1", b"111").unwrap();
            db.put(b"xx2", b"112").unwrap();
            db.put(b"xx3", b"113").unwrap();
            db.put(b"xx4", b"114").unwrap();
            db.put(b"xx5", b"115").unwrap();
            db.delete(b"xx2").unwrap();
        }

        {
            let mut db = DB::open("db", opt.clone()).unwrap();
            db.delete(b"xx5").unwrap();
        }

        {
            let mut db = DB::open("db", opt.clone()).unwrap();

            assert_eq!(None, db.get(b"xx5"));

            let ss = db.get_snapshot();
            db.put(b"xx4", b"222").unwrap();
            let ss2 = db.get_snapshot();

            assert_eq!(Some(b"113".to_vec()), db.get_at(&ss, b"xx3").unwrap());
            assert_eq!(None, db.get_at(&ss, b"xx2").unwrap());
            assert_eq!(None, db.get_at(&ss, b"xx5").unwrap());

            assert_eq!(Some(b"114".to_vec()), db.get_at(&ss, b"xx4").unwrap());
            assert_eq!(Some(b"222".to_vec()), db.get_at(&ss2, b"xx4").unwrap());
        }

        {
            let mut db = DB::open("db", opt).unwrap();

            let ss = db.get_snapshot();
            assert_eq!(Some(b"113".to_vec()), db.get_at(&ss, b"xx3").unwrap());
            assert_eq!(Some(b"222".to_vec()), db.get_at(&ss, b"xx4").unwrap());
            assert_eq!(None, db.get_at(&ss, b"xx2").unwrap());
        }
    }