fn test_db_impl_get_from_table_with_snapshot()

in common/rusty_leveldb_sgx/src/db_impl.rs [1484:1533]

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

    fn test_db_impl_get_from_table_with_snapshot() {
        let mut db = build_db().0;

        assert_eq!(30, db.vset.borrow().last_seq);

        // seq = 31
        db.put("xyy".as_bytes(), "123".as_bytes()).unwrap();
        let old_ss = db.get_snapshot();
        // seq = 32
        db.put("xyz".as_bytes(), "123".as_bytes()).unwrap();
        db.flush().unwrap();
        assert!(db.get_at(&old_ss, "xyy".as_bytes()).unwrap().is_some());
        assert!(db.get_at(&old_ss, "xyz".as_bytes()).unwrap().is_none());

        // memtable get
        assert_eq!(
            "123".as_bytes(),
            db.get("xyz".as_bytes()).unwrap().as_slice()
        );
        assert!(db.get_internal(31, "xyy".as_bytes()).unwrap().is_some());
        assert!(db.get_internal(32, "xyy".as_bytes()).unwrap().is_some());

        assert!(db.get_internal(31, "xyz".as_bytes()).unwrap().is_none());
        assert!(db.get_internal(32, "xyz".as_bytes()).unwrap().is_some());

        // table get
        assert_eq!(
            "val2".as_bytes(),
            db.get("eab".as_bytes()).unwrap().as_slice()
        );
        assert!(db.get_internal(3, "eab".as_bytes()).unwrap().is_none());
        assert!(db.get_internal(32, "eab".as_bytes()).unwrap().is_some());

        {
            let ss = db.get_snapshot();
            assert_eq!(
                "val2".as_bytes(),
                db.get_at(&ss, "eab".as_bytes())
                    .unwrap()
                    .unwrap()
                    .as_slice()
            );
        }

        // from table.
        assert_eq!(
            "val2".as_bytes(),
            db.get("cab".as_bytes()).unwrap().as_slice()
        );
    }